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mdbx-posix: destroys shared mutexes in the last process.

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This commit is contained in:
Leonid Yuriev 2019-08-25 14:18:06 +03:00
parent ed58af2512
commit a03c5d1f3f
1 changed files with 12 additions and 1 deletions
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13
src/lck-posix.c
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@ -263,8 +263,19 @@ void __cold mdbx_lck_destroy(MDBX_env *env) {
/* File locks would be released (by kernel) while the file-descriptors
* will be closed. But to avoid false-positive EDEADLK from the kernel,
* locks should be released here explicitly with properly order. */
if (env->me_lfd != INVALID_HANDLE_VALUE)
if (env->me_lfd != INVALID_HANDLE_VALUE) {
/* try get exclusive access */
if (env->me_lck &&
mdbx_lck_op(env->me_lfd, OP_SETLK, F_WRLCK, 0, OFF_T_MAX) == 0) {
mdbx_info("%s: got exclusive, drown mutexes", mdbx_func_);
int rc = pthread_mutex_destroy(&env->me_lck->mti_rmutex);
if (rc == 0)
rc = pthread_mutex_destroy(&env->me_lck->mti_wmutex);
assert(rc == 0);
(void)rc;
}
(void)mdbx_lck_op(env->me_lfd, OP_SETLK, F_UNLCK, 0, OFF_T_MAX);
}
if (env->me_fd != INVALID_HANDLE_VALUE)
(void)mdbx_lck_op(env->me_fd, OP_SETLK, F_UNLCK, 0, OFF_T_MAX);
}