62 lines
1.8 KiB
C
62 lines
1.8 KiB
C
// Copyright (c) 2018 David Crawshaw <david@zentus.com>
|
|
//
|
|
// Permission to use, copy, modify, and distribute this software for any
|
|
// purpose with or without fee is hereby granted, provided that the above
|
|
// copyright notice and this permission notice appear in all copies.
|
|
//
|
|
// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
|
|
// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
|
|
// MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
|
|
// ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
|
|
// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
|
|
// ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
|
|
// OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
|
|
|
|
// This file defines the wait_for_unlock_notify function.
|
|
// See the documentation on Stmt.Step.
|
|
|
|
#include <blocking_step.h>
|
|
#include <stdlib.h>
|
|
|
|
unlock_note* unlock_note_alloc() {
|
|
unlock_note* un = (unlock_note*)malloc(sizeof(unlock_note));
|
|
pthread_mutex_init(&un->mu, 0);
|
|
pthread_cond_init(&un->cond, 0);
|
|
return un;
|
|
}
|
|
|
|
void unlock_note_free(unlock_note* un) {
|
|
pthread_cond_destroy(&un->cond);
|
|
pthread_mutex_destroy(&un->mu);
|
|
free(un);
|
|
}
|
|
|
|
void unlock_note_fire(unlock_note* un) {
|
|
pthread_mutex_lock(&un->mu);
|
|
un->fired = 1;
|
|
pthread_cond_signal(&un->cond);
|
|
pthread_mutex_unlock(&un->mu);
|
|
}
|
|
|
|
static void unlock_notify_cb(void **apArg, int nArg) {
|
|
for(int i=0; i < nArg; i++) {
|
|
unlock_note_fire((unlock_note*)apArg[i]);
|
|
}
|
|
}
|
|
|
|
int wait_for_unlock_notify(sqlite3 *db, unlock_note* un) {
|
|
un->fired = 0;
|
|
|
|
int res = sqlite3_unlock_notify(db, unlock_notify_cb, (void *)un);
|
|
|
|
if (res == SQLITE_OK) {
|
|
pthread_mutex_lock(&un->mu);
|
|
if (!un->fired) {
|
|
pthread_cond_wait(&un->cond, &un->mu);
|
|
}
|
|
pthread_mutex_unlock(&un->mu);
|
|
}
|
|
|
|
return res;
|
|
}
|