[chore] update dependencies (#4468)

- github.com/ncruces/go-sqlite3
- codeberg.org/gruf/go-mempool
- codeberg.org/gruf/go-structr (changes related on the above) *
- codeberg.org/gruf/go-mutexes (changes related on the above) *

* this is largely just fiddling around with package internals in structr and mutexes to rely on changes in mempool, which added a new concurrency-safe pool

Reviewed-on: https://codeberg.org/superseriousbusiness/gotosocial/pulls/4468
Co-authored-by: kim <grufwub@gmail.com>
Co-committed-by: kim <grufwub@gmail.com>

go.mod

@@ -25,13 +25,13 @@ require (
 	codeberg.org/gruf/go-iotools v0.0.0-20240710125620-934ae9c654cf
 	codeberg.org/gruf/go-kv/v2 v2.0.7
 	codeberg.org/gruf/go-list v0.0.0-20240425093752-494db03d641f
-	codeberg.org/gruf/go-mempool v0.0.0-20240507125005-cef10d64a760
+	codeberg.org/gruf/go-mempool v0.0.0-20251003110531-b54adae66253
-	codeberg.org/gruf/go-mutexes v1.5.3
+	codeberg.org/gruf/go-mutexes v1.5.8
 	codeberg.org/gruf/go-runners v1.6.3
 	codeberg.org/gruf/go-sched v1.2.4
 	codeberg.org/gruf/go-split v1.2.0
 	codeberg.org/gruf/go-storage v0.3.1
-	codeberg.org/gruf/go-structr v0.9.9
+	codeberg.org/gruf/go-structr v0.9.12
 	github.com/DmitriyVTitov/size v1.5.0
 	github.com/KimMachineGun/automemlimit v0.7.4
 	github.com/SherClockHolmes/webpush-go v1.4.0
@@ -53,7 +53,7 @@ require (
 	github.com/miekg/dns v1.1.68
 	github.com/minio/minio-go/v7 v7.0.95
 	github.com/mitchellh/mapstructure v1.5.0
-	github.com/ncruces/go-sqlite3 v0.29.0
+	github.com/ncruces/go-sqlite3 v0.29.1
 	github.com/oklog/ulid v1.3.1
 	github.com/pquerna/otp v1.5.0
 	github.com/rivo/uniseg v0.4.7

go.sum

@@ -42,10 +42,10 @@ codeberg.org/gruf/go-mangler/v2 v2.0.6 h1:c3cwnI6Mi17EAwGSYGNMN6+9PMzaIj2GLAKx9D
 codeberg.org/gruf/go-mangler/v2 v2.0.6/go.mod h1:CXIm7zAWPdNmZVAGM1NRiF/ekJTPE7YTb8kiRxiEFaQ=
 codeberg.org/gruf/go-maps v1.0.4 h1:K+Ww4vvR3TZqm5jqrKVirmguZwa3v1VUvmig2SE8uxY=
 codeberg.org/gruf/go-maps v1.0.4/go.mod h1:ASX7osM7kFwt5O8GfGflcFjrwYGD8eIuRLl/oMjhEi8=
-codeberg.org/gruf/go-mempool v0.0.0-20240507125005-cef10d64a760 h1:m2/UCRXhjDwAg4vyji6iKCpomKw6P4PmBOUi5DvAMH4=
+codeberg.org/gruf/go-mempool v0.0.0-20251003110531-b54adae66253 h1:qPAY72xCWlySVROSNZecfLGAyeV/SiXmPmfhUU+o3Xw=
-codeberg.org/gruf/go-mempool v0.0.0-20240507125005-cef10d64a760/go.mod h1:E3RcaCFNq4zXpvaJb8lfpPqdUAmSkP5F1VmMiEUYTEk=
+codeberg.org/gruf/go-mempool v0.0.0-20251003110531-b54adae66253/go.mod h1:761koiXmqfgzvu5mez2Rk7YlwWilpqJ/zv5hIA6NoNI=
-codeberg.org/gruf/go-mutexes v1.5.3 h1:RIEy1UuDxKgAiINRMrPxTUWSGW6pFx9DzeJN4WPqra8=
+codeberg.org/gruf/go-mutexes v1.5.8 h1:HRGnvT4COb3jX9xdeoSUUbjPgmk5kXPuDfld9ksUJKA=
-codeberg.org/gruf/go-mutexes v1.5.3/go.mod h1:AnhagsMzUISL/nBVwhnHwDwTZOAxMILwCOG8/wKOblg=
+codeberg.org/gruf/go-mutexes v1.5.8/go.mod h1:21sy/hWH8dDQBk7ocsxqo2GNpWiIir+e82RG3hjnN20=
 codeberg.org/gruf/go-runners v1.6.3 h1:To/AX7eTrWuXrTkA3RA01YTP5zha1VZ68LQ+0D4RY7E=
 codeberg.org/gruf/go-runners v1.6.3/go.mod h1:oXAaUmG2VxoKttpCqZGv5nQBeSvZSR2BzIk7h1yTRlU=
 codeberg.org/gruf/go-sched v1.2.4 h1:ddBB9o0D/2oU8NbQ0ldN5aWxogpXPRBATWi58+p++Hw=
@@ -54,8 +54,8 @@ codeberg.org/gruf/go-split v1.2.0 h1:PmzL23nVEVHm8VxjsJmv4m4wGQz2bGgQw52dgSSj65c
 codeberg.org/gruf/go-split v1.2.0/go.mod h1:0rejWJpqvOoFAd7nwm5tIXYKaAqjtFGOXmTqQV+VO38=
 codeberg.org/gruf/go-storage v0.3.1 h1:g66UIM/xXnEk9ejT+W0T9s/PODBZhXa/8ajzeY/MELI=
 codeberg.org/gruf/go-storage v0.3.1/go.mod h1:r43n/zi7YGOCl2iSl7AMI27D1zcWS65Bi2+5xDzypeo=
-codeberg.org/gruf/go-structr v0.9.9 h1:fwIzi/94yBNSWleXZIfVW/QyNK5+/xxI2reVYzu5V/c=
+codeberg.org/gruf/go-structr v0.9.12 h1:yMopvexnuKgZme9WgvIhrJaAuAjfper/x38xsVuJOOo=
-codeberg.org/gruf/go-structr v0.9.9/go.mod h1:5dsazOsIeJyV8Dl2DdSXqCDEZUx3e3dc41N6f2mPtgw=
+codeberg.org/gruf/go-structr v0.9.12/go.mod h1:sP2ZSjM5X5XKlxuhAbTKuVQm9DWbHsrQRuTl3MUwbHw=
 codeberg.org/gruf/go-xunsafe v0.0.0-20250809104800-512a9df57d73 h1:pRaOwIOS1WSZoPCAvE0H1zpv+D4gF37OVppybffqdI8=
 codeberg.org/gruf/go-xunsafe v0.0.0-20250809104800-512a9df57d73/go.mod h1:9wkq+dmHjUhB/0ZxDUWAwsWuXwwGyx5N1dDCB9hpWs8=
 codeberg.org/superseriousbusiness/go-swagger v0.32.3-gts-go1.23-fix h1:k76/Th+bruqU/d+dB0Ru466ctTF2aVjKpisy/471ILE=
@@ -338,8 +338,8 @@ github.com/modern-go/reflect2 v1.0.2 h1:xBagoLtFs94CBntxluKeaWgTMpvLxC4ur3nMaC9G
 github.com/modern-go/reflect2 v1.0.2/go.mod h1:yWuevngMOJpCy52FWWMvUC8ws7m/LJsjYzDa0/r8luk=
 github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822 h1:C3w9PqII01/Oq1c1nUAm88MOHcQC9l5mIlSMApZMrHA=
 github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822/go.mod h1:+n7T8mK8HuQTcFwEeznm/DIxMOiR9yIdICNftLE1DvQ=
-github.com/ncruces/go-sqlite3 v0.29.0 h1:1tsLiagCoqZEfcHDeKsNSv5jvrY/Iu393pAnw2wLNJU=
+github.com/ncruces/go-sqlite3 v0.29.1 h1:NIi8AISWBToRHyoz01FXiTNvU147Tqdibgj2tFzJCqM=
-github.com/ncruces/go-sqlite3 v0.29.0/go.mod h1:r1hSvYKPNJ+OlUA1O3r8o9LAawzPAlqeZiIdxTBBBJ0=
+github.com/ncruces/go-sqlite3 v0.29.1/go.mod h1:PpccBNNhvjwUOwDQEn2gXQPFPTWdlromj0+fSkd5KSg=
 github.com/ncruces/go-strftime v0.1.9 h1:bY0MQC28UADQmHmaF5dgpLmImcShSi2kHU9XLdhx/f4=
 github.com/ncruces/go-strftime v0.1.9/go.mod h1:Fwc5htZGVVkseilnfgOVb9mKy6w1naJmn9CehxcKcls=
 github.com/ncruces/julianday v1.0.0 h1:fH0OKwa7NWvniGQtxdJRxAgkBMolni2BjDHaWTxqt7M=

internal/queue/simple.go

@@ -31,7 +31,7 @@ import (
 // elements to reduce overall memory usage.
 type SimpleQueue[T any] struct {
 	l list.List[T]
-	p mempool.UnsafePool
+	p mempool.UnsafeSimplePool
 	w chan struct{}
 	m sync.Mutex
 }

vendor/codeberg.org/gruf/go-mempool/pool.go

@@ -1,17 +1,17 @@
 package mempool
 
 import (
+	"sync"
+	"sync/atomic"
 	"unsafe"
+
+	"golang.org/x/sys/cpu"
 )
 
-const DefaultDirtyFactor = 128
+// Pool provides a form of SimplePool
-
+// with the addition of concurrency safety.
-// Pool provides a type-safe form
-// of UnsafePool using generics.
-//
-// Note it is NOT safe for concurrent
-// use, you must protect it yourself!
 type Pool[T any] struct {
+	UnsafePool
 
 	// New is an optionally provided
 	// allocator used when no value
@@ -21,79 +21,119 @@ type Pool[T any] struct {
 	// Reset is an optionally provided
 	// value resetting function called
 	// on passed value to Put().
-	Reset func(T)
+	Reset func(T) bool
+}
 
-	UnsafePool
+func NewPool[T any](new func() T, reset func(T) bool, check func(current, victim int) bool) Pool[T] {
+	return Pool[T]{
+		New:        new,
+		Reset:      reset,
+		UnsafePool: NewUnsafePool(check),
+	}
 }
 
 func (p *Pool[T]) Get() T {
 	if ptr := p.UnsafePool.Get(); ptr != nil {
 		return *(*T)(ptr)
-	} else if p.New != nil {
-		return p.New()
 	}
-	var z T
+	var t T
-	return z
+	if p.New != nil {
+		t = p.New()
+	}
+	return t
 }
 
 func (p *Pool[T]) Put(t T) {
-	if p.Reset != nil {
+	if p.Reset != nil && !p.Reset(t) {
-		p.Reset(t)
+		return
 	}
 	ptr := unsafe.Pointer(&t)
 	p.UnsafePool.Put(ptr)
 }
 
-// UnsafePool provides an incredibly
+// UnsafePool provides a form of UnsafeSimplePool
-// simple memory pool implementation
+// with the addition of concurrency safety.
-// that stores ptrs to memory values,
-// and regularly flushes internal pool
-// structures according to DirtyFactor.
-//
-// Note it is NOT safe for concurrent
-// use, you must protect it yourself!
 type UnsafePool struct {
-
+	internal
-	// DirtyFactor determines the max
+	_ [cache_line_size - unsafe.Sizeof(internal{})%cache_line_size]byte
-	// number of $dirty count before
-	// pool is garbage collected. Where:
-	// $dirty = len(current) - len(victim)
-	DirtyFactor int
-
-	current []unsafe.Pointer
-	victim  []unsafe.Pointer
 }
 
-func (p *UnsafePool) Get() unsafe.Pointer {
+func NewUnsafePool(check func(current, victim int) bool) UnsafePool {
-	// First try current list.
+	return UnsafePool{internal: internal{
-	if len(p.current) > 0 {
+		pool: UnsafeSimplePool{Check: check},
-		ptr := p.current[len(p.current)-1]
+	}}
-		p.current = p.current[:len(p.current)-1]
+}
+
+const (
+	// current platform integer size.
+	int_size = 32 << (^uint(0) >> 63)
+
+	// platform CPU cache line size to avoid false sharing.
+	cache_line_size = unsafe.Sizeof(cpu.CacheLinePad{})
+)
+
+type internal struct {
+	// fast-access ring-buffer of
+	// pointers accessible by index.
+	//
+	// if Go ever exposes goroutine IDs
+	// to us we can make this a lot faster.
+	ring  [int_size / 4]unsafe.Pointer
+	index atomic.Uint64
+
+	// underlying pool and
+	// slow mutex protection.
+	pool  UnsafeSimplePool
+	mutex sync.Mutex
+}
+
+func (p *internal) Check(fn func(current, victim int) bool) func(current, victim int) bool {
+	p.mutex.Lock()
+	if fn == nil {
+		if p.pool.Check == nil {
+			fn = defaultCheck
+		} else {
+			fn = p.pool.Check
+		}
+	} else {
+		p.pool.Check = fn
+	}
+	p.mutex.Unlock()
+	return fn
+}
+
+func (p *internal) Get() unsafe.Pointer {
+	if ptr := atomic.SwapPointer(&p.ring[p.index.Load()%uint64(cap(p.ring))], nil); ptr != nil {
+		p.index.Add(^uint64(0)) // i.e. -1
+		return ptr
+	}
+	p.mutex.Lock()
+	ptr := p.pool.Get()
+	p.mutex.Unlock()
 	return ptr
 }
 
-	// Fallback to victim.
+func (p *internal) Put(ptr unsafe.Pointer) {
-	if len(p.victim) > 0 {
+	if atomic.CompareAndSwapPointer(&p.ring[p.index.Add(1)%uint64(cap(p.ring))], nil, ptr) {
-		ptr := p.victim[len(p.victim)-1]
+		return
-		p.victim = p.victim[:len(p.victim)-1]
+	}
-		return ptr
+	p.mutex.Lock()
+	p.pool.Put(ptr)
+	p.mutex.Unlock()
 }
 
-	return nil
+func (p *internal) GC() {
+	for i := range p.ring {
+		atomic.StorePointer(&p.ring[i], nil)
+	}
+	p.mutex.Lock()
+	p.pool.GC()
+	p.mutex.Unlock()
 }
 
-func (p *UnsafePool) Put(ptr unsafe.Pointer) {
+func (p *internal) Size() int {
-	p.current = append(p.current, ptr)
+	p.mutex.Lock()
-
+	sz := p.pool.Size()
-	// Get dirty factor.
+	p.mutex.Unlock()
-	df := p.DirtyFactor
+	return sz
-	if df == 0 {
-		df = DefaultDirtyFactor
-	}
-
-	if len(p.current)-len(p.victim) > df {
-		// Garbage collection!
-		p.victim = p.current
-		p.current = nil
-	}
 }

vendor/codeberg.org/gruf/go-mempool/simple.go

@@ -0,0 +1,111 @@
+package mempool
+
+import (
+	"unsafe"
+)
+
+// SimplePool provides a type-safe form
+// of UnsafePool using generics.
+//
+// Note it is NOT safe for concurrent
+// use, you must protect it yourself!
+type SimplePool[T any] struct {
+	UnsafeSimplePool
+
+	// New is an optionally provided
+	// allocator used when no value
+	// is available for use in pool.
+	New func() T
+
+	// Reset is an optionally provided
+	// value resetting function called
+	// on passed value to Put().
+	Reset func(T) bool
+}
+
+func (p *SimplePool[T]) Get() T {
+	if ptr := p.UnsafeSimplePool.Get(); ptr != nil {
+		return *(*T)(ptr)
+	}
+	var t T
+	if p.New != nil {
+		t = p.New()
+	}
+	return t
+}
+
+func (p *SimplePool[T]) Put(t T) {
+	if p.Reset != nil && !p.Reset(t) {
+		return
+	}
+	ptr := unsafe.Pointer(&t)
+	p.UnsafeSimplePool.Put(ptr)
+}
+
+// UnsafeSimplePool provides an incredibly
+// simple memory pool implementation
+// that stores ptrs to memory values,
+// and regularly flushes internal pool
+// structures according to CheckGC().
+//
+// Note it is NOT safe for concurrent
+// use, you must protect it yourself!
+type UnsafeSimplePool struct {
+
+	// Check determines how often to flush
+	// internal pools based on underlying
+	// current and victim pool sizes. It gets
+	// called on every pool Put() operation.
+	//
+	// A flush will start a new current
+	// pool, make victim the old current,
+	// and drop the existing victim pool.
+	Check func(current, victim int) bool
+
+	current []unsafe.Pointer
+	victim  []unsafe.Pointer
+}
+
+func (p *UnsafeSimplePool) Get() unsafe.Pointer {
+	// First try current list.
+	if len(p.current) > 0 {
+		ptr := p.current[len(p.current)-1]
+		p.current = p.current[:len(p.current)-1]
+		return ptr
+	}
+
+	// Fallback to victim.
+	if len(p.victim) > 0 {
+		ptr := p.victim[len(p.victim)-1]
+		p.victim = p.victim[:len(p.victim)-1]
+		return ptr
+	}
+
+	return nil
+}
+
+func (p *UnsafeSimplePool) Put(ptr unsafe.Pointer) {
+	p.current = append(p.current, ptr)
+
+	// Get GC check func.
+	if p.Check == nil {
+		p.Check = defaultCheck
+	}
+
+	if p.Check(len(p.current), len(p.victim)) {
+		p.GC() // garbage collection time!
+	}
+}
+
+func (p *UnsafeSimplePool) GC() {
+	p.victim = p.current
+	p.current = nil
+}
+
+func (p *UnsafeSimplePool) Size() int {
+	return len(p.current) + len(p.victim)
+}
+
+func defaultCheck(current, victim int) bool {
+	return current-victim > 128 || victim > 256
+}

vendor/codeberg.org/gruf/go-mutexes/map.go

@@ -26,14 +26,13 @@ const (
 type MutexMap struct {
 	mapmu  sync.Mutex
 	mumap  hashmap
-	mupool mempool.UnsafePool
+	mupool mempool.UnsafeSimplePool
 }
 
 // checkInit ensures MutexMap is initialized (UNSAFE).
 func (mm *MutexMap) checkInit() {
 	if mm.mumap.m == nil {
 		mm.mumap.init(0)
-		mm.mupool.DirtyFactor = 256
 	}
 }
 
@@ -175,13 +174,9 @@ func (mu *rwmutex) Lock(lt uint8) bool {
 // sleeping goroutines waiting on this mutex.
 func (mu *rwmutex) Unlock() bool {
 	switch mu.l--; {
-	case mu.l > 0 && mu.t == lockTypeWrite:
-		panic("BUG: multiple writer locks")
-	case mu.l < 0:
-		panic("BUG: negative lock count")
-
 	case mu.l == 0:
-		// Fully unlocked.
+		// Fully
+		// unlock.
 		mu.t = 0
 
 		// Awake all blocked goroutines and check
@@ -197,12 +192,16 @@ func (mu *rwmutex) Unlock() bool {
 		// (before == after) => (waiters = 0)
 		return (before == after)
 
-	default:
+	case mu.l < 0:
+		panic("BUG: negative lock count")
+	case mu.t == lockTypeWrite:
+		panic("BUG: multiple write locks")
+	}
+
 	// i.e. mutex still
 	// locked by others.
 	return false
 }
-}
 
 // WaitRelock expects a mutex to be passed in, already in the
 // locked state. It incr the notifyList waiter count before

vendor/codeberg.org/gruf/go-structr/index.go

@@ -4,10 +4,10 @@ import (
 	"os"
 	"reflect"
 	"strings"
-	"sync"
 	"unsafe"
 
 	"codeberg.org/gruf/go-byteutil"
+	"codeberg.org/gruf/go-mempool"
 	"codeberg.org/gruf/go-xunsafe"
 )
 
@@ -371,17 +371,15 @@ type index_entry struct {
 	key string
 }
 
-var index_entry_pool sync.Pool
+var index_entry_pool mempool.UnsafePool
 
 // new_index_entry returns a new prepared index_entry.
 func new_index_entry() *index_entry {
-	v := index_entry_pool.Get()
+	if ptr := index_entry_pool.Get(); ptr != nil {
-	if v == nil {
+		return (*index_entry)(ptr)
-		e := new(index_entry)
-		e.elem.data = unsafe.Pointer(e)
-		v = e
 	}
-	entry := v.(*index_entry)
+	entry := new(index_entry)
+	entry.elem.data = unsafe.Pointer(entry)
 	return entry
 }
 
@@ -396,7 +394,8 @@ func free_index_entry(entry *index_entry) {
 	entry.key = ""
 	entry.index = nil
 	entry.item = nil
-	index_entry_pool.Put(entry)
+	ptr := unsafe.Pointer(entry)
+	index_entry_pool.Put(ptr)
 }
 
 func is_unique(f uint8) bool {

vendor/codeberg.org/gruf/go-structr/item.go

@@ -2,8 +2,9 @@ package structr
 
 import (
 	"os"
-	"sync"
 	"unsafe"
+
+	"codeberg.org/gruf/go-mempool"
 )
 
 type indexed_item struct {
@@ -19,17 +20,15 @@ type indexed_item struct {
 	indexed []*index_entry
 }
 
-var indexed_item_pool sync.Pool
+var indexed_item_pool mempool.UnsafePool
 
 // new_indexed_item returns a new prepared indexed_item.
 func new_indexed_item() *indexed_item {
-	v := indexed_item_pool.Get()
+	if ptr := indexed_item_pool.Get(); ptr != nil {
-	if v == nil {
+		return (*indexed_item)(ptr)
-		i := new(indexed_item)
-		i.elem.data = unsafe.Pointer(i)
-		v = i
 	}
-	item := v.(*indexed_item)
+	item := new(indexed_item)
+	item.elem.data = unsafe.Pointer(item)
 	return item
 }
 
@@ -43,7 +42,8 @@ func free_indexed_item(item *indexed_item) {
 		return
 	}
 	item.data = nil
-	indexed_item_pool.Put(item)
+	ptr := unsafe.Pointer(item)
+	indexed_item_pool.Put(ptr)
 }
 
 // drop_index will drop the given index entry from item's indexed.

vendor/codeberg.org/gruf/go-structr/list.go

@@ -2,8 +2,9 @@ package structr
 
 import (
 	"os"
-	"sync"
 	"unsafe"
+
+	"codeberg.org/gruf/go-mempool"
 )
 
 // elem represents an elem
@@ -27,16 +28,14 @@ type list struct {
 	len  int
 }
 
-var list_pool sync.Pool
+var list_pool mempool.UnsafePool
 
 // new_list returns a new prepared list.
 func new_list() *list {
-	v := list_pool.Get()
+	if ptr := list_pool.Get(); ptr != nil {
-	if v == nil {
+		return (*list)(ptr)
-		v = new(list)
 	}
-	list := v.(*list)
+	return new(list)
-	return list
 }
 
 // free_list releases the list.
@@ -48,11 +47,13 @@ func free_list(list *list) {
 		os.Stderr.WriteString(msg + "\n")
 		return
 	}
-	list_pool.Put(list)
+	ptr := unsafe.Pointer(list)
+	list_pool.Put(ptr)
 }
 
 // push_front will push the given elem to front (head) of list.
 func (l *list) push_front(elem *list_elem) {
+
 	// Set new head.
 	oldHead := l.head
 	l.head = elem
@@ -66,12 +67,14 @@ func (l *list) push_front(elem *list_elem) {
 		l.tail = elem
 	}
 
-	// Incr count
+	// Incr
+	// count
 	l.len++
 }
 
 // push_back will push the given elem to back (tail) of list.
 func (l *list) push_back(elem *list_elem) {
+
 	// Set new tail.
 	oldTail := l.tail
 	l.tail = elem
@@ -85,7 +88,8 @@ func (l *list) push_back(elem *list_elem) {
 		l.head = elem
 	}
 
-	// Incr count
+	// Incr
+	// count
 	l.len++
 }
 
@@ -131,7 +135,8 @@ func (l *list) insert(elem *list_elem, at *list_elem) {
 		elem.next = oldNext
 	}
 
-	// Incr count
+	// Incr
+	// count
 	l.len++
 }
 
@@ -174,6 +179,7 @@ func (l *list) remove(elem *list_elem) {
 		prev.next = next
 	}
 
-	// Decr count
+	// Decr
+	// count
 	l.len--
 }

vendor/codeberg.org/gruf/go-structr/runtime.go

@@ -146,7 +146,7 @@ func find_field(t xunsafe.TypeIter, names []string) (sfield struct_field, ftype
 	sfield.mangle = mangler.Get(t)
 
 	// Calculate zero value string.
-	zptr := zero_value_field(o, sfield.offsets)
+	zptr := zero_value_ptr(o, sfield.offsets)
 	zstr := string(sfield.mangle(nil, zptr))
 	sfield.zerostr = zstr
 	sfield.zero = zptr
@@ -154,7 +154,9 @@ func find_field(t xunsafe.TypeIter, names []string) (sfield struct_field, ftype
 	return
 }
 
-// zero_value ...
+// zero_value iterates the type contained in TypeIter{} along the given
+// next_offset{} values, creating new ptrs where necessary, returning the
+// zero reflect.Value{} after fully iterating the next_offset{} slice.
 func zero_value(t xunsafe.TypeIter, offsets []next_offset) reflect.Value {
 	v := reflect.New(t.Type).Elem()
 	for _, offset := range offsets {
@@ -175,8 +177,8 @@ func zero_value(t xunsafe.TypeIter, offsets []next_offset) reflect.Value {
 	return v
 }
 
-// zero_value_field ...
+// zero_value_ptr returns the unsafe pointer address of the result of zero_value().
-func zero_value_field(t xunsafe.TypeIter, offsets []next_offset) unsafe.Pointer {
+func zero_value_ptr(t xunsafe.TypeIter, offsets []next_offset) unsafe.Pointer {
 	return zero_value(t, offsets).Addr().UnsafePointer()
 }
 

vendor/codeberg.org/gruf/go-structr/timeline.go

@@ -8,6 +8,8 @@ import (
 	"strings"
 	"sync"
 	"unsafe"
+
+	"codeberg.org/gruf/go-mempool"
 )
 
 // Direction defines a direction
@@ -1133,18 +1135,16 @@ func to_timeline_item(item *indexed_item) *timeline_item {
 	return to
 }
 
-var timeline_item_pool sync.Pool
+var timeline_item_pool mempool.UnsafePool
 
 // new_timeline_item returns a new prepared timeline_item.
 func new_timeline_item() *timeline_item {
-	v := timeline_item_pool.Get()
+	if ptr := timeline_item_pool.Get(); ptr != nil {
-	if v == nil {
+		return (*timeline_item)(ptr)
-		i := new(timeline_item)
-		i.elem.data = unsafe.Pointer(i)
-		i.ck = ^uint(0)
-		v = i
 	}
-	item := v.(*timeline_item)
+	item := new(timeline_item)
+	item.elem.data = unsafe.Pointer(item)
+	item.ck = ^uint(0)
 	return item
 }
 
@@ -1159,5 +1159,6 @@ func free_timeline_item(item *timeline_item) {
 	}
 	item.data = nil
 	item.pk = nil
-	timeline_item_pool.Put(item)
+	ptr := unsafe.Pointer(item)
+	timeline_item_pool.Put(ptr)
 }

vendor/github.com/ncruces/go-sqlite3/conn.go

@@ -444,20 +444,27 @@ func (c *Conn) Status(op DBStatus, reset bool) (current, highwater int, err erro
 // https://sqlite.org/c3ref/table_column_metadata.html
 func (c *Conn) TableColumnMetadata(schema, table, column string) (declType, collSeq string, notNull, primaryKey, autoInc bool, err error) {
 	defer c.arena.mark()()
-
+	var (
-	var schemaPtr, columnPtr ptr_t
+		declTypePtr   ptr_t
-	declTypePtr := c.arena.new(ptrlen)
+		collSeqPtr    ptr_t
-	collSeqPtr := c.arena.new(ptrlen)
+		notNullPtr    ptr_t
-	notNullPtr := c.arena.new(ptrlen)
+		primaryKeyPtr ptr_t
-	autoIncPtr := c.arena.new(ptrlen)
+		autoIncPtr    ptr_t
-	primaryKeyPtr := c.arena.new(ptrlen)
+		columnPtr     ptr_t
+		schemaPtr     ptr_t
+	)
+	if column != "" {
+		declTypePtr = c.arena.new(ptrlen)
+		collSeqPtr = c.arena.new(ptrlen)
+		notNullPtr = c.arena.new(ptrlen)
+		primaryKeyPtr = c.arena.new(ptrlen)
+		autoIncPtr = c.arena.new(ptrlen)
+		columnPtr = c.arena.string(column)
+	}
 	if schema != "" {
 		schemaPtr = c.arena.string(schema)
 	}
 	tablePtr := c.arena.string(table)
-	if column != "" {
-		columnPtr = c.arena.string(column)
-	}
 
 	rc := res_t(c.call("sqlite3_table_column_metadata", stk_t(c.handle),
 		stk_t(schemaPtr), stk_t(tablePtr), stk_t(columnPtr),

vendor/github.com/ncruces/go-sqlite3/context.go

@@ -1,7 +1,6 @@
 package sqlite3
 
 import (
-	"encoding/json"
 	"errors"
 	"math"
 	"time"
@@ -173,21 +172,6 @@ func (ctx Context) ResultPointer(ptr any) {
 		stk_t(ctx.handle), stk_t(valPtr))
 }
 
-// ResultJSON sets the result of the function to the JSON encoding of value.
-//
-// https://sqlite.org/c3ref/result_blob.html
-func (ctx Context) ResultJSON(value any) {
-	err := json.NewEncoder(callbackWriter(func(p []byte) (int, error) {
-		ctx.ResultRawText(p[:len(p)-1]) // remove the newline
-		return 0, nil
-	})).Encode(value)
-
-	if err != nil {
-		ctx.ResultError(err)
-		return // notest
-	}
-}
-
 // ResultValue sets the result of the function to a copy of [Value].
 //
 // https://sqlite.org/c3ref/result_blob.html

vendor/github.com/ncruces/go-sqlite3/driver/driver.go

@@ -608,13 +608,23 @@ type scantype byte
 
 const (
 	_ANY scantype = iota
-	_INT  scantype = scantype(sqlite3.INTEGER)
+	_INT
-	_REAL scantype = scantype(sqlite3.FLOAT)
+	_REAL
-	_TEXT scantype = scantype(sqlite3.TEXT)
+	_TEXT
-	_BLOB scantype = scantype(sqlite3.BLOB)
+	_BLOB
-	_NULL scantype = scantype(sqlite3.NULL)
+	_NULL
-	_BOOL scantype = iota
+	_BOOL
 	_TIME
+	_NOT_NULL
+)
+
+var (
+	_ [0]struct{} = [scantype(sqlite3.INTEGER) - _INT]struct{}{}
+	_ [0]struct{} = [scantype(sqlite3.FLOAT) - _REAL]struct{}{}
+	_ [0]struct{} = [scantype(sqlite3.TEXT) - _TEXT]struct{}{}
+	_ [0]struct{} = [scantype(sqlite3.BLOB) - _BLOB]struct{}{}
+	_ [0]struct{} = [scantype(sqlite3.NULL) - _NULL]struct{}{}
+	_ [0]struct{} = [_NOT_NULL & (_NOT_NULL - 1)]struct{}{}
 )
 
 func scanFromDecl(decl string) scantype {
@@ -644,8 +654,8 @@ type rows struct {
 	*stmt
 	names []string
 	types []string
-	nulls []bool
 	scans []scantype
+	dest  []driver.Value
 }
 
 var (
@@ -675,34 +685,36 @@ func (r *rows) Columns() []string {
 
 func (r *rows) scanType(index int) scantype {
 	if r.scans == nil {
-		count := r.Stmt.ColumnCount()
+		count := len(r.names)
 		scans := make([]scantype, count)
 		for i := range scans {
 			scans[i] = scanFromDecl(strings.ToUpper(r.Stmt.ColumnDeclType(i)))
 		}
 		r.scans = scans
 	}
-	return r.scans[index]
+	return r.scans[index] &^ _NOT_NULL
 }
 
 func (r *rows) loadColumnMetadata() {
-	if r.nulls == nil {
+	if r.types == nil {
 		c := r.Stmt.Conn()
-		count := r.Stmt.ColumnCount()
+		count := len(r.names)
-		nulls := make([]bool, count)
 		types := make([]string, count)
 		scans := make([]scantype, count)
-		for i := range nulls {
+		for i := range types {
+			var notnull bool
 			if col := r.Stmt.ColumnOriginName(i); col != "" {
-				types[i], _, nulls[i], _, _, _ = c.TableColumnMetadata(
+				types[i], _, notnull, _, _, _ = c.TableColumnMetadata(
 					r.Stmt.ColumnDatabaseName(i),
 					r.Stmt.ColumnTableName(i),
 					col)
 				types[i] = strings.ToUpper(types[i])
 				scans[i] = scanFromDecl(types[i])
+				if notnull {
+					scans[i] |= _NOT_NULL
+				}
 			}
 		}
-		r.nulls = nulls
 		r.types = types
 		r.scans = scans
 	}
@@ -721,15 +733,13 @@ func (r *rows) ColumnTypeDatabaseTypeName(index int) string {
 
 func (r *rows) ColumnTypeNullable(index int) (nullable, ok bool) {
 	r.loadColumnMetadata()
-	if r.nulls[index] {
+	nullable = r.scans[index]&^_NOT_NULL == 0
-		return false, true
+	return nullable, !nullable
-	}
-	return true, false
 }
 
 func (r *rows) ColumnTypeScanType(index int) (typ reflect.Type) {
 	r.loadColumnMetadata()
-	scan := r.scans[index]
+	scan := r.scans[index] &^ _NOT_NULL
 
 	if r.Stmt.Busy() {
 		// SQLite is dynamically typed and we now have a row.
@@ -772,6 +782,7 @@ func (r *rows) ColumnTypeScanType(index int) (typ reflect.Type) {
 }
 
 func (r *rows) Next(dest []driver.Value) error {
+	r.dest = nil
 	c := r.Stmt.Conn()
 	if old := c.SetInterrupt(r.ctx); old != r.ctx {
 		defer c.SetInterrupt(old)
@@ -790,18 +801,7 @@ func (r *rows) Next(dest []driver.Value) error {
 	}
 	for i := range dest {
 		scan := r.scanType(i)
-		switch v := dest[i].(type) {
+		if v, ok := dest[i].([]byte); ok {
-		case int64:
-			if scan == _BOOL {
-				switch v {
-				case 1:
-					dest[i] = true
-				case 0:
-					dest[i] = false
-				}
-				continue
-			}
-		case []byte:
 			if len(v) == cap(v) { // a BLOB
 				continue
 			}
@@ -816,38 +816,49 @@ func (r *rows) Next(dest []driver.Value) error {
 				}
 			}
 			dest[i] = string(v)
-		case float64:
-			break
-		default:
-			continue
 		}
-		if scan == _TIME {
+		switch scan {
+		case _TIME:
 			t, err := r.tmRead.Decode(dest[i])
 			if err == nil {
 				dest[i] = t
-				continue
+			}
+		case _BOOL:
+			switch dest[i] {
+			case int64(0):
+				dest[i] = false
+			case int64(1):
+				dest[i] = true
 			}
 		}
 	}
+	r.dest = dest
 	return nil
 }
 
-func (r *rows) ScanColumn(dest any, index int) error {
+func (r *rows) ScanColumn(dest any, index int) (err error) {
 	// notest // Go 1.26
-	var ptr *time.Time
+	var tm *time.Time
+	var ok *bool
 	switch d := dest.(type) {
 	case *time.Time:
-		ptr = d
+		tm = d
 	case *sql.NullTime:
-		ptr = &d.Time
+		tm = &d.Time
+		ok = &d.Valid
 	case *sql.Null[time.Time]:
-		ptr = &d.V
+		tm = &d.V
+		ok = &d.Valid
 	default:
 		return driver.ErrSkip
 	}
-	if t := r.Stmt.ColumnTime(index, r.tmRead); !t.IsZero() {
+	value := r.dest[index]
-		*ptr = t
+	*tm, err = r.tmRead.Decode(value)
+	if ok != nil {
+		*ok = err == nil
+		if value == nil {
 			return nil
 		}
-	return driver.ErrSkip
+	}
+	return err
 }

vendor/github.com/ncruces/go-sqlite3/internal/util/json.go

@@ -1,3 +1,5 @@
+//go:build !goexperiment.jsonv2
+
 package util
 
 import (

vendor/github.com/ncruces/go-sqlite3/internal/util/json_v2.go

@@ -0,0 +1,52 @@
+//go:build goexperiment.jsonv2
+
+package util
+
+import (
+	"encoding/json/v2"
+	"math"
+	"strconv"
+	"time"
+	"unsafe"
+)
+
+type JSON struct{ Value any }
+
+func (j JSON) Scan(value any) error {
+	var buf []byte
+
+	switch v := value.(type) {
+	case []byte:
+		buf = v
+	case string:
+		buf = unsafe.Slice(unsafe.StringData(v), len(v))
+	case int64:
+		buf = strconv.AppendInt(nil, v, 10)
+	case float64:
+		buf = AppendNumber(nil, v)
+	case time.Time:
+		buf = append(buf, '"')
+		buf = v.AppendFormat(buf, time.RFC3339Nano)
+		buf = append(buf, '"')
+	case nil:
+		buf = []byte("null")
+	default:
+		panic(AssertErr())
+	}
+
+	return json.Unmarshal(buf, j.Value)
+}
+
+func AppendNumber(dst []byte, f float64) []byte {
+	switch {
+	case math.IsNaN(f):
+		dst = append(dst, "null"...)
+	case math.IsInf(f, 1):
+		dst = append(dst, "9.0e999"...)
+	case math.IsInf(f, -1):
+		dst = append(dst, "-9.0e999"...)
+	default:
+		return strconv.AppendFloat(dst, f, 'g', -1, 64)
+	}
+	return dst
+}

vendor/github.com/ncruces/go-sqlite3/json.go

@@ -1,6 +1,13 @@
+//go:build !goexperiment.jsonv2
+
 package sqlite3
 
-import "github.com/ncruces/go-sqlite3/internal/util"
+import (
+	"encoding/json"
+	"strconv"
+
+	"github.com/ncruces/go-sqlite3/internal/util"
+)
 
 // JSON returns a value that can be used as an argument to
 // [database/sql.DB.Exec], [database/sql.Row.Scan] and similar methods to
@@ -10,3 +17,77 @@ import "github.com/ncruces/go-sqlite3/internal/util"
 func JSON(value any) any {
 	return util.JSON{Value: value}
 }
+
+// ResultJSON sets the result of the function to the JSON encoding of value.
+//
+// https://sqlite.org/c3ref/result_blob.html
+func (ctx Context) ResultJSON(value any) {
+	err := json.NewEncoder(callbackWriter(func(p []byte) (int, error) {
+		ctx.ResultRawText(p[:len(p)-1]) // remove the newline
+		return 0, nil
+	})).Encode(value)
+
+	if err != nil {
+		ctx.ResultError(err)
+		return // notest
+	}
+}
+
+// BindJSON binds the JSON encoding of value to the prepared statement.
+// The leftmost SQL parameter has an index of 1.
+//
+// https://sqlite.org/c3ref/bind_blob.html
+func (s *Stmt) BindJSON(param int, value any) error {
+	return json.NewEncoder(callbackWriter(func(p []byte) (int, error) {
+		return 0, s.BindRawText(param, p[:len(p)-1]) // remove the newline
+	})).Encode(value)
+}
+
+// ColumnJSON parses the JSON-encoded value of the result column
+// and stores it in the value pointed to by ptr.
+// The leftmost column of the result set has the index 0.
+//
+// https://sqlite.org/c3ref/column_blob.html
+func (s *Stmt) ColumnJSON(col int, ptr any) error {
+	var data []byte
+	switch s.ColumnType(col) {
+	case NULL:
+		data = []byte("null")
+	case TEXT:
+		data = s.ColumnRawText(col)
+	case BLOB:
+		data = s.ColumnRawBlob(col)
+	case INTEGER:
+		data = strconv.AppendInt(nil, s.ColumnInt64(col), 10)
+	case FLOAT:
+		data = util.AppendNumber(nil, s.ColumnFloat(col))
+	default:
+		panic(util.AssertErr())
+	}
+	return json.Unmarshal(data, ptr)
+}
+
+// JSON parses a JSON-encoded value
+// and stores the result in the value pointed to by ptr.
+func (v Value) JSON(ptr any) error {
+	var data []byte
+	switch v.Type() {
+	case NULL:
+		data = []byte("null")
+	case TEXT:
+		data = v.RawText()
+	case BLOB:
+		data = v.RawBlob()
+	case INTEGER:
+		data = strconv.AppendInt(nil, v.Int64(), 10)
+	case FLOAT:
+		data = util.AppendNumber(nil, v.Float())
+	default:
+		panic(util.AssertErr())
+	}
+	return json.Unmarshal(data, ptr)
+}
+
+type callbackWriter func(p []byte) (int, error)
+
+func (fn callbackWriter) Write(p []byte) (int, error) { return fn(p) }

vendor/github.com/ncruces/go-sqlite3/json_v2.go

@@ -0,0 +1,113 @@
+//go:build goexperiment.jsonv2
+
+package sqlite3
+
+import (
+	"encoding/json/v2"
+	"strconv"
+
+	"github.com/ncruces/go-sqlite3/internal/util"
+)
+
+// JSON returns a value that can be used as an argument to
+// [database/sql.DB.Exec], [database/sql.Row.Scan] and similar methods to
+// store value as JSON, or decode JSON into value.
+// JSON should NOT be used with [Stmt.BindJSON], [Stmt.ColumnJSON],
+// [Value.JSON], or [Context.ResultJSON].
+func JSON(value any) any {
+	return util.JSON{Value: value}
+}
+
+// ResultJSON sets the result of the function to the JSON encoding of value.
+//
+// https://sqlite.org/c3ref/result_blob.html
+func (ctx Context) ResultJSON(value any) {
+	w := bytesWriter{sqlite: ctx.c.sqlite}
+	if err := json.MarshalWrite(&w, value); err != nil {
+		ctx.c.free(w.ptr)
+		ctx.ResultError(err)
+		return // notest
+	}
+	ctx.c.call("sqlite3_result_text_go",
+		stk_t(ctx.handle), stk_t(w.ptr), stk_t(len(w.buf)))
+}
+
+// BindJSON binds the JSON encoding of value to the prepared statement.
+// The leftmost SQL parameter has an index of 1.
+//
+// https://sqlite.org/c3ref/bind_blob.html
+func (s *Stmt) BindJSON(param int, value any) error {
+	w := bytesWriter{sqlite: s.c.sqlite}
+	if err := json.MarshalWrite(&w, value); err != nil {
+		s.c.free(w.ptr)
+		return err
+	}
+	rc := res_t(s.c.call("sqlite3_bind_text_go",
+		stk_t(s.handle), stk_t(param),
+		stk_t(w.ptr), stk_t(len(w.buf))))
+	return s.c.error(rc)
+}
+
+// ColumnJSON parses the JSON-encoded value of the result column
+// and stores it in the value pointed to by ptr.
+// The leftmost column of the result set has the index 0.
+//
+// https://sqlite.org/c3ref/column_blob.html
+func (s *Stmt) ColumnJSON(col int, ptr any) error {
+	var data []byte
+	switch s.ColumnType(col) {
+	case NULL:
+		data = []byte("null")
+	case TEXT:
+		data = s.ColumnRawText(col)
+	case BLOB:
+		data = s.ColumnRawBlob(col)
+	case INTEGER:
+		data = strconv.AppendInt(nil, s.ColumnInt64(col), 10)
+	case FLOAT:
+		data = util.AppendNumber(nil, s.ColumnFloat(col))
+	default:
+		panic(util.AssertErr())
+	}
+	return json.Unmarshal(data, ptr)
+}
+
+// JSON parses a JSON-encoded value
+// and stores the result in the value pointed to by ptr.
+func (v Value) JSON(ptr any) error {
+	var data []byte
+	switch v.Type() {
+	case NULL:
+		data = []byte("null")
+	case TEXT:
+		data = v.RawText()
+	case BLOB:
+		data = v.RawBlob()
+	case INTEGER:
+		data = strconv.AppendInt(nil, v.Int64(), 10)
+	case FLOAT:
+		data = util.AppendNumber(nil, v.Float())
+	default:
+		panic(util.AssertErr())
+	}
+	return json.Unmarshal(data, ptr)
+}
+
+type bytesWriter struct {
+	*sqlite
+	buf []byte
+	ptr ptr_t
+}
+
+func (b *bytesWriter) Write(p []byte) (n int, err error) {
+	if len(p) > cap(b.buf)-len(b.buf) {
+		want := int64(len(b.buf)) + int64(len(p))
+		grow := int64(cap(b.buf))
+		grow += grow >> 1
+		want = max(want, grow)
+		b.ptr = b.realloc(b.ptr, want)
+		b.buf = util.View(b.mod, b.ptr, want)[:len(b.buf)]
+	}
+	b.buf = append(b.buf, p...)
+	return len(p), nil
+}

vendor/github.com/ncruces/go-sqlite3/sqlite.go

@@ -5,6 +5,7 @@ import (
 	"context"
 	"math/bits"
 	"os"
+	"strings"
 	"sync"
 	"unsafe"
 
@@ -128,11 +129,10 @@ func (sqlt *sqlite) error(rc res_t, handle ptr_t, sql ...string) error {
 		var msg, query string
 		if ptr := ptr_t(sqlt.call("sqlite3_errmsg", stk_t(handle))); ptr != 0 {
 			msg = util.ReadString(sqlt.mod, ptr, _MAX_LENGTH)
-			switch {
+			if msg == "not an error" {
-			case msg == "not an error":
-				msg = ""
-			case msg == util.ErrorCodeString(uint32(rc))[len("sqlite3: "):]:
 				msg = ""
+			} else {
+				msg = strings.TrimPrefix(msg, util.ErrorCodeString(uint32(rc))[len("sqlite3: "):])
 			}
 		}
 

vendor/github.com/ncruces/go-sqlite3/stmt.go

@@ -1,9 +1,7 @@
 package sqlite3
 
 import (
-	"encoding/json"
 	"math"
-	"strconv"
 	"time"
 
 	"github.com/ncruces/go-sqlite3/internal/util"
@@ -362,16 +360,6 @@ func (s *Stmt) BindPointer(param int, ptr any) error {
 	return s.c.error(rc)
 }
 
-// BindJSON binds the JSON encoding of value to the prepared statement.
-// The leftmost SQL parameter has an index of 1.
-//
-// https://sqlite.org/c3ref/bind_blob.html
-func (s *Stmt) BindJSON(param int, value any) error {
-	return json.NewEncoder(callbackWriter(func(p []byte) (int, error) {
-		return 0, s.BindRawText(param, p[:len(p)-1]) // remove the newline
-	})).Encode(value)
-}
-
 // BindValue binds a copy of value to the prepared statement.
 // The leftmost SQL parameter has an index of 1.
 //
@@ -598,30 +586,6 @@ func (s *Stmt) columnRawBytes(col int, ptr ptr_t, nul int32) []byte {
 	return util.View(s.c.mod, ptr, int64(n+nul))[:n]
 }
 
-// ColumnJSON parses the JSON-encoded value of the result column
-// and stores it in the value pointed to by ptr.
-// The leftmost column of the result set has the index 0.
-//
-// https://sqlite.org/c3ref/column_blob.html
-func (s *Stmt) ColumnJSON(col int, ptr any) error {
-	var data []byte
-	switch s.ColumnType(col) {
-	case NULL:
-		data = []byte("null")
-	case TEXT:
-		data = s.ColumnRawText(col)
-	case BLOB:
-		data = s.ColumnRawBlob(col)
-	case INTEGER:
-		data = strconv.AppendInt(nil, s.ColumnInt64(col), 10)
-	case FLOAT:
-		data = util.AppendNumber(nil, s.ColumnFloat(col))
-	default:
-		panic(util.AssertErr())
-	}
-	return json.Unmarshal(data, ptr)
-}
-
 // ColumnValue returns the unprotected value of the result column.
 // The leftmost column of the result set has the index 0.
 //
@@ -748,7 +712,3 @@ func (s *Stmt) columns(count int64) ([]byte, ptr_t, error) {
 
 	return util.View(s.c.mod, typePtr, count), dataPtr, nil
 }
-
-type callbackWriter func(p []byte) (int, error)
-
-func (fn callbackWriter) Write(p []byte) (int, error) { return fn(p) }

vendor/github.com/ncruces/go-sqlite3/time.go

@@ -94,7 +94,7 @@ func (f TimeFormat) Encode(t time.Time) any {
 	case TimeFormatUnix:
 		return t.Unix()
 	case TimeFormatUnixFrac:
-		return float64(t.Unix()) + float64(t.Nanosecond())*1e-9
+		return math.FMA(1e-9, float64(t.Nanosecond()), float64(t.Unix()))
 	case TimeFormatUnixMilli:
 		return t.UnixMilli()
 	case TimeFormatUnixMicro:

vendor/github.com/ncruces/go-sqlite3/value.go

@@ -1,9 +1,7 @@
 package sqlite3
 
 import (
-	"encoding/json"
 	"math"
-	"strconv"
 	"time"
 
 	"github.com/ncruces/go-sqlite3/internal/util"
@@ -162,27 +160,6 @@ func (v Value) Pointer() any {
 	return util.GetHandle(v.c.ctx, ptr)
 }
 
-// JSON parses a JSON-encoded value
-// and stores the result in the value pointed to by ptr.
-func (v Value) JSON(ptr any) error {
-	var data []byte
-	switch v.Type() {
-	case NULL:
-		data = []byte("null")
-	case TEXT:
-		data = v.RawText()
-	case BLOB:
-		data = v.RawBlob()
-	case INTEGER:
-		data = strconv.AppendInt(nil, v.Int64(), 10)
-	case FLOAT:
-		data = util.AppendNumber(nil, v.Float())
-	default:
-		panic(util.AssertErr())
-	}
-	return json.Unmarshal(data, ptr)
-}
-
 // NoChange returns true if and only if the value is unchanged
 // in a virtual table update operatiom.
 //

vendor/github.com/ncruces/go-sqlite3/vfs/const.go

@@ -94,6 +94,10 @@ const (
 	OPEN_PRIVATECACHE  OpenFlag = 0x00040000 /* Ok for sqlite3_open_v2() */
 	OPEN_WAL           OpenFlag = 0x00080000 /* VFS only */
 	OPEN_NOFOLLOW      OpenFlag = 0x01000000 /* Ok for sqlite3_open_v2() */
+	_FLAG_ATOMIC       OpenFlag = 0x10000000
+	_FLAG_KEEP_WAL     OpenFlag = 0x20000000
+	_FLAG_PSOW         OpenFlag = 0x40000000
+	_FLAG_SYNC_DIR     OpenFlag = 0x80000000
 )
 
 // AccessFlag is a flag for the [VFS] Access method.

vendor/github.com/ncruces/go-sqlite3/vfs/file.go

@@ -51,7 +51,7 @@ func (vfsOS) Delete(path string, syncDir bool) error {
 			return _OK
 		}
 		defer f.Close()
-		err = osSync(f, false, false)
+		err = osSync(f, 0, SYNC_FULL)
 		if err != nil {
 			return _IOERR_DIR_FSYNC
 		}
@@ -132,13 +132,15 @@ func (vfsOS) OpenFilename(name *Filename, flags OpenFlag) (File, OpenFlag, error
 
 	file := vfsFile{
 		File:  f,
-		psow:     true,
+		flags: flags | _FLAG_PSOW,
-		atomic:   osBatchAtomic(f),
-		readOnly: flags&OPEN_READONLY != 0,
-		syncDir:  isUnix && isCreate && isJournl,
-		delete:   !isUnix && flags&OPEN_DELETEONCLOSE != 0,
 		shm:   NewSharedMemory(name.String()+"-shm", flags),
 	}
+	if osBatchAtomic(f) {
+		file.flags |= _FLAG_ATOMIC
+	}
+	if isUnix && isCreate && isJournl {
+		file.flags |= _FLAG_SYNC_DIR
+	}
 	return &file, flags, nil
 }
 
@@ -146,12 +148,7 @@ type vfsFile struct {
 	*os.File
 	shm   SharedMemory
 	lock  LockLevel
-	readOnly bool
+	flags OpenFlag
-	keepWAL  bool
-	syncDir  bool
-	atomic   bool
-	delete   bool
-	psow     bool
 }
 
 var (
@@ -164,7 +161,7 @@ var (
 )
 
 func (f *vfsFile) Close() error {
-	if f.delete {
+	if !isUnix && f.flags&OPEN_DELETEONCLOSE != 0 {
 		defer os.Remove(f.Name())
 	}
 	if f.shm != nil {
@@ -183,21 +180,18 @@ func (f *vfsFile) WriteAt(p []byte, off int64) (n int, err error) {
 }
 
 func (f *vfsFile) Sync(flags SyncFlag) error {
-	dataonly := (flags & SYNC_DATAONLY) != 0
+	err := osSync(f.File, f.flags, flags)
-	fullsync := (flags & 0x0f) == SYNC_FULL
-
-	err := osSync(f.File, fullsync, dataonly)
 	if err != nil {
 		return err
 	}
-	if isUnix && f.syncDir {
+	if isUnix && f.flags&_FLAG_SYNC_DIR != 0 {
-		f.syncDir = false
+		f.flags ^= _FLAG_SYNC_DIR
 		d, err := os.Open(filepath.Dir(f.File.Name()))
 		if err != nil {
 			return nil
 		}
 		defer d.Close()
-		err = osSync(d, false, false)
+		err = osSync(f.File, f.flags, flags)
 		if err != nil {
 			return _IOERR_DIR_FSYNC
 		}
@@ -215,10 +209,10 @@ func (f *vfsFile) SectorSize() int {
 
 func (f *vfsFile) DeviceCharacteristics() DeviceCharacteristic {
 	ret := IOCAP_SUBPAGE_READ
-	if f.atomic {
+	if f.flags&_FLAG_ATOMIC != 0 {
 		ret |= IOCAP_BATCH_ATOMIC
 	}
-	if f.psow {
+	if f.flags&_FLAG_PSOW != 0 {
 		ret |= IOCAP_POWERSAFE_OVERWRITE
 	}
 	if runtime.GOOS == "windows" {
@@ -250,7 +244,19 @@ func (f *vfsFile) HasMoved() (bool, error) {
 }
 
 func (f *vfsFile) LockState() LockLevel     { return f.lock }
-func (f *vfsFile) PowersafeOverwrite() bool        { return f.psow }
+func (f *vfsFile) PowersafeOverwrite() bool { return f.flags&_FLAG_PSOW != 0 }
-func (f *vfsFile) PersistWAL() bool                { return f.keepWAL }
+func (f *vfsFile) PersistWAL() bool         { return f.flags&_FLAG_KEEP_WAL != 0 }
-func (f *vfsFile) SetPowersafeOverwrite(psow bool) { f.psow = psow }
+
-func (f *vfsFile) SetPersistWAL(keepWAL bool)      { f.keepWAL = keepWAL }
+func (f *vfsFile) SetPowersafeOverwrite(psow bool) {
+	f.flags &^= _FLAG_PSOW
+	if psow {
+		f.flags |= _FLAG_PSOW
+	}
+}
+
+func (f *vfsFile) SetPersistWAL(keepWAL bool) {
+	f.flags &^= _FLAG_KEEP_WAL
+	if keepWAL {
+		f.flags |= _FLAG_KEEP_WAL
+	}
+}

vendor/github.com/ncruces/go-sqlite3/vfs/lock.go

@@ -41,7 +41,7 @@ func (f *vfsFile) Lock(lock LockLevel) error {
 	}
 
 	// Do not allow any kind of write-lock on a read-only database.
-	if f.readOnly && lock >= LOCK_RESERVED {
+	if lock >= LOCK_RESERVED && f.flags&OPEN_READONLY != 0 {
 		return _IOERR_LOCK
 	}
 

vendor/github.com/ncruces/go-sqlite3/vfs/memdb/README.md

@@ -7,3 +7,6 @@ It has some benefits over the C version:
 - the memory backing the database needs not be contiguous,
 - the database can grow/shrink incrementally without copying,
 - reader-writer concurrency is slightly improved.
+
+[`memdb.TestDB`](https://pkg.go.dev/github.com/ncruces/go-sqlite3/vfs/memdb#TestDB)
+is the preferred way to setup an in-memory database for testing.

vendor/github.com/ncruces/go-sqlite3/vfs/memdb/api.go

@@ -10,6 +10,7 @@
 package memdb
 
 import (
+	"crypto/rand"
 	"fmt"
 	"net/url"
 	"sync"
@@ -74,11 +75,27 @@ func Delete(name string) {
 
 // TestDB creates an empty shared memory database for the test to use.
 // The database is automatically deleted when the test and all its subtests complete.
+// Returns a URI filename appropriate to call Open with.
 // Each subsequent call to TestDB returns a unique database.
+//
+//	func Test_something(t *testing.T) {
+//		t.Parallel()
+//		dsn := memdb.TestDB(t, url.Values{
+//			"_pragma": {"busy_timeout(1000)"},
+//		})
+//
+//		db, err := sql.Open("sqlite3", dsn)
+//		if err != nil {
+//			t.Fatal(err)
+//		}
+//		defer db.Close()
+//
+//		// ...
+//	}
 func TestDB(tb testing.TB, params ...url.Values) string {
 	tb.Helper()
 
-	name := fmt.Sprintf("%s_%p", tb.Name(), tb)
+	name := fmt.Sprintf("%s_%s", tb.Name(), rand.Text())
 	tb.Cleanup(func() { Delete(name) })
 	Create(name, nil)
 

vendor/github.com/ncruces/go-sqlite3/vfs/os_darwin.go

@@ -23,12 +23,26 @@ type flocktimeout_t struct {
 	timeout unix.Timespec
 }
 
-func osSync(file *os.File, fullsync, _ /*dataonly*/ bool) error {
+func osSync(file *os.File, open OpenFlag, sync SyncFlag) error {
-	if fullsync {
+	var cmd int
-		return file.Sync()
+	if sync&SYNC_FULL == SYNC_FULL {
+		// For rollback journals all we really need is a barrier.
+		if open&OPEN_MAIN_JOURNAL != 0 {
+			cmd = unix.F_BARRIERFSYNC
+		} else {
+			cmd = unix.F_FULLFSYNC
 		}
+	}
+
+	fd := file.Fd()
 	for {
-		err := unix.Fsync(int(file.Fd()))
+		err := error(unix.ENOTSUP)
+		if cmd != 0 {
+			_, err = unix.FcntlInt(fd, cmd, 0)
+		}
+		if err == unix.ENOTSUP {
+			err = unix.Fsync(int(fd))
+		}
 		if err != unix.EINTR {
 			return err
 		}

vendor/github.com/ncruces/go-sqlite3/vfs/os_linux.go

@@ -10,7 +10,7 @@ import (
 	"golang.org/x/sys/unix"
 )
 
-func osSync(file *os.File, _ /*fullsync*/, _ /*dataonly*/ bool) error {
+func osSync(file *os.File, _ OpenFlag, _ SyncFlag) error {
 	// SQLite trusts Linux's fdatasync for all fsync's.
 	for {
 		err := unix.Fdatasync(int(file.Fd()))

vendor/github.com/ncruces/go-sqlite3/vfs/os_std_sync.go

@@ -4,6 +4,6 @@ package vfs
 
 import "os"
 
-func osSync(file *os.File, _ /*fullsync*/, _ /*dataonly*/ bool) error {
+func osSync(file *os.File, _ OpenFlag, _ SyncFlag) error {
 	return file.Sync()
 }

vendor/modules.txt

@@ -271,11 +271,11 @@ codeberg.org/gruf/go-mangler/v2
 # codeberg.org/gruf/go-maps v1.0.4
 ## explicit; go 1.20
 codeberg.org/gruf/go-maps
-# codeberg.org/gruf/go-mempool v0.0.0-20240507125005-cef10d64a760
+# codeberg.org/gruf/go-mempool v0.0.0-20251003110531-b54adae66253
-## explicit; go 1.22.2
+## explicit; go 1.24.0
 codeberg.org/gruf/go-mempool
-# codeberg.org/gruf/go-mutexes v1.5.3
+# codeberg.org/gruf/go-mutexes v1.5.8
-## explicit; go 1.22.2
+## explicit; go 1.24.0
 codeberg.org/gruf/go-mutexes
 # codeberg.org/gruf/go-runners v1.6.3
 ## explicit; go 1.19
@@ -293,7 +293,7 @@ codeberg.org/gruf/go-storage/disk
 codeberg.org/gruf/go-storage/internal
 codeberg.org/gruf/go-storage/memory
 codeberg.org/gruf/go-storage/s3
-# codeberg.org/gruf/go-structr v0.9.9
+# codeberg.org/gruf/go-structr v0.9.12
 ## explicit; go 1.24.5
 codeberg.org/gruf/go-structr
 # codeberg.org/gruf/go-xunsafe v0.0.0-20250809104800-512a9df57d73
@@ -727,7 +727,7 @@ github.com/modern-go/reflect2
 # github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822
 ## explicit
 github.com/munnerz/goautoneg
-# github.com/ncruces/go-sqlite3 v0.29.0
+# github.com/ncruces/go-sqlite3 v0.29.1
 ## explicit; go 1.24.0
 github.com/ncruces/go-sqlite3
 github.com/ncruces/go-sqlite3/driver