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Add support for sqlite3_unlock_notify
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,89 @@ | ||
| // Copyright (C) 2018 Yasuhiro Matsumoto <mattn.jp@gmail.com>. | ||
| // | ||
| // Use of this source code is governed by an MIT-style | ||
| // license that can be found in the LICENSE file. | ||
|
|
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| #ifdef SQLITE_ENABLE_UNLOCK_NOTIFY | ||
| #include <sqlite3-binding.h> | ||
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| extern int unlock_notify_wait(sqlite3 *db); | ||
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| void _unlock_notify_callback(void *arg, int argc) | ||
| { | ||
| extern void unlock_notify_callback(void *, int); | ||
| unlock_notify_callback(arg, argc); | ||
| } | ||
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| int | ||
| sqlite3_step_blocking(sqlite3_stmt *stmt) | ||
| { | ||
| int rv; | ||
| sqlite3* db = sqlite3_db_handle(stmt); | ||
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| for (;;) { | ||
| rv = sqlite3_step(stmt); | ||
| if (rv != SQLITE_LOCKED) { | ||
| break; | ||
| } | ||
| if (sqlite3_extended_errcode(db) != SQLITE_LOCKED_SHAREDCACHE) { | ||
| break; | ||
| } | ||
| rv = unlock_notify_wait(db); | ||
| if (rv != SQLITE_OK) { | ||
| break; | ||
| } | ||
| sqlite3_reset(stmt); | ||
| } | ||
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| return rv; | ||
| } | ||
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| int | ||
| _sqlite3_step_blocking(sqlite3_stmt* stmt, long long* rowid, long long* changes) | ||
| { | ||
| int rv; | ||
| sqlite3* db; | ||
|
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| for (;;) { | ||
| rv = sqlite3_step(stmt); | ||
| if (rv!=SQLITE_LOCKED) { | ||
| break; | ||
| } | ||
| if (sqlite3_extended_errcode(db) != SQLITE_LOCKED_SHAREDCACHE) { | ||
| break; | ||
| } | ||
| rv = unlock_notify_wait(db); | ||
| if (rv != SQLITE_OK) { | ||
| break; | ||
| } | ||
| sqlite3_reset(stmt); | ||
| } | ||
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| db = sqlite3_db_handle(stmt); | ||
| *rowid = (long long) sqlite3_last_insert_rowid(db); | ||
| *changes = (long long) sqlite3_changes(db); | ||
| return rv; | ||
| } | ||
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| int | ||
| sqlite3_prepare_v2_blocking(sqlite3 *db, const char *zSql, int nBytes, sqlite3_stmt **ppStmt, const char **pzTail) | ||
| { | ||
| int rv; | ||
|
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| for (;;) { | ||
| rv = sqlite3_prepare_v2(db, zSql, nBytes, ppStmt, pzTail); | ||
| if (rv!=SQLITE_LOCKED) { | ||
| break; | ||
| } | ||
| if (sqlite3_extended_errcode(db) != SQLITE_LOCKED_SHAREDCACHE) { | ||
| break; | ||
| } | ||
| rv = unlock_notify_wait(db); | ||
| if (rv != SQLITE_OK) { | ||
| break; | ||
| } | ||
| } | ||
|
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| return rv; | ||
| } | ||
| #endif |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,53 @@ | ||
| // Copyright (C) 2018 Yasuhiro Matsumoto <mattn.jp@gmail.com>. | ||
| // | ||
| // Use of this source code is governed by an MIT-style | ||
| // license that can be found in the LICENSE file. | ||
|
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| // +build cgo | ||
| // +build sqlite_unlock_notify | ||
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| package sqlite3 | ||
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| /* | ||
| #cgo CFLAGS: -DSQLITE_ENABLE_UNLOCK_NOTIFY | ||
| #include <sqlite3-binding.h> | ||
| extern void _unlock_notify_callback(void *arg, int argc); | ||
| */ | ||
| import "C" | ||
| import ( | ||
| "sync" | ||
| "unsafe" | ||
| ) | ||
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| type unlockNotification struct { | ||
| notify chan struct{} | ||
| lock sync.Mutex | ||
| } | ||
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| //export unlock_notify_callback | ||
| func unlock_notify_callback(pargv unsafe.Pointer, argc C.int) { | ||
| argv := *(*uintptr)(pargv) | ||
| v := (*[1 << 30]uintptr)(unsafe.Pointer(argv)) | ||
| for i := 0; i < int(argc); i++ { | ||
| un := lookupHandle(v[i]).(unlockNotification) | ||
| un.notify <- struct{}{} | ||
| } | ||
| } | ||
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| var notifyMutex sync.Mutex | ||
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| //export unlock_notify_wait | ||
| func unlock_notify_wait(db *C.sqlite3) C.int { | ||
| var un unlockNotification | ||
| un.notify = make(chan struct{}) | ||
| defer close(un.notify) | ||
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| argv := [1]uintptr{newHandle(nil, un)} | ||
| if rv := C.sqlite3_unlock_notify(db, (*[0]byte)(C._unlock_notify_callback), unsafe.Pointer(&argv)); rv != C.SQLITE_OK { | ||
| return rv | ||
| } | ||
| <-un.notify | ||
| return C.SQLITE_OK | ||
| } |