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Interrupt busy handlers.

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This commit is contained in:
Nuno Cruces
2024-05-19 01:04:56 +01:00
parent 3d30a561f0
commit ed932ee93b
11 changed files with 113 additions and 11 deletions
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34
conn.go
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@@ -346,10 +346,9 @@ func (c *Conn) checkInterrupt() {
}
func progressCallback(ctx context.Context, mod api.Module, pDB uint32) (interrupt uint32) {
if c, ok := ctx.Value(connKey{}).(*Conn); ok && c.handle == pDB && c.interrupt != nil {
if c.interrupt.Err() != nil {
interrupt = 1
}
if c, ok := ctx.Value(connKey{}).(*Conn); ok && c.handle == pDB &&
c.interrupt != nil && c.interrupt.Err() != nil {
interrupt = 1
}
return interrupt
}
@@ -363,6 +362,30 @@ func (c *Conn) BusyTimeout(timeout time.Duration) error {
return c.error(r)
}
func timeoutCallback(ctx context.Context, mod api.Module, pDB uint32, count, tmout int32) (retry uint32) {
if c, ok := ctx.Value(connKey{}).(*Conn); ok &&
(c.interrupt == nil || c.interrupt.Err() == nil) {
const delays = "\x01\x02\x05\x0a\x0f\x14\x19\x19\x19\x32\x32\x64"
const totals = "\x00\x01\x03\x08\x12\x21\x35\x4e\x67\x80\xb2\xe4"
const ndelay = int32(len(delays) - 1)
var delay, prior int32
if count <= ndelay {
delay = int32(delays[count])
prior = int32(totals[count])
} else {
delay = int32(delays[ndelay])
prior = int32(totals[ndelay]) + delay*(count-ndelay)
}
if delay = min(delay, tmout-prior); delay > 0 {
time.Sleep(time.Duration(delay) * time.Millisecond)
retry = 1
}
}
return retry
}
// BusyHandler registers a callback to handle [BUSY] errors.
//
// https://sqlite.org/c3ref/busy_handler.html
@@ -380,7 +403,8 @@ func (c *Conn) BusyHandler(cb func(count int) (retry bool)) error {
}
func busyCallback(ctx context.Context, mod api.Module, pDB uint32, count int32) (retry uint32) {
if c, ok := ctx.Value(connKey{}).(*Conn); ok && c.handle == pDB && c.busy != nil {
if c, ok := ctx.Value(connKey{}).(*Conn); ok && c.handle == pDB && c.busy != nil &&
(c.interrupt == nil || c.interrupt.Err() == nil) {
if c.busy(int(count)) {
retry = 1
}