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- /* Copyright (c) 2014, 2021, Oracle and/or its affiliates.
-
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License, version 2.0,
- as published by the Free Software Foundation.
-
- This program is also distributed with certain software (including
- but not limited to OpenSSL) that is licensed under separate terms,
- as designated in a particular file or component or in included license
- documentation. The authors of MySQL hereby grant you an additional
- permission to link the program and your derivative works with the
- separately licensed software that they have included with MySQL.
-
- Without limiting anything contained in the foregoing, this file,
- which is part of C Driver for MySQL (Connector/C), is also subject to the
- Universal FOSS Exception, version 1.0, a copy of which can be found at
- http://oss.oracle.com/licenses/universal-foss-exception.
-
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License, version 2.0, for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */
-
- #ifdef SAFE_MUTEX
-
- #include "thr_cond.h"
- #include "my_thread_local.h"
-
- int safe_cond_wait(native_cond_t *cond, my_mutex_t *mp,
- const char *file, uint line)
- {
- int error;
- native_mutex_lock(&mp->global);
- if (mp->count == 0)
- {
- fprintf(stderr,"safe_mutex: Trying to cond_wait on a unlocked mutex at %s, line %d\n",file,line);
- fflush(stderr);
- abort();
- }
- if (!my_thread_equal(my_thread_self(),mp->thread))
- {
- fprintf(stderr,"safe_mutex: Trying to cond_wait on a mutex at %s, line %d that was locked by another thread at: %s, line: %d\n",
- file,line,mp->file,mp->line);
- fflush(stderr);
- abort();
- }
-
- if (mp->count-- != 1)
- {
- fprintf(stderr,"safe_mutex: Count was %d on locked mutex at %s, line %d\n",
- mp->count+1, file, line);
- fflush(stderr);
- abort();
- }
- native_mutex_unlock(&mp->global);
- error= native_cond_wait(cond,&mp->mutex);
- native_mutex_lock(&mp->global);
- if (error)
- {
- fprintf(stderr,"safe_mutex: Got error: %d (%d) when doing a safe_mutex_wait at %s, line %d\n", error, errno, file, line);
- fflush(stderr);
- abort();
- }
- mp->thread= my_thread_self();
- if (mp->count++)
- {
- #ifndef NDEBUG
- fprintf(stderr,
- "safe_mutex: Count was %d in thread 0x%x when locking mutex at %s, line %d\n",
- mp->count-1, my_thread_var_id(), file, line);
- fflush(stderr);
- #endif
- abort();
- }
- mp->file= file;
- mp->line=line;
- native_mutex_unlock(&mp->global);
- return error;
- }
-
-
- int safe_cond_timedwait(native_cond_t *cond, my_mutex_t *mp,
- const struct timespec *abstime,
- const char *file, uint line)
- {
- int error;
- native_mutex_lock(&mp->global);
- if (mp->count != 1 || !my_thread_equal(my_thread_self(),mp->thread))
- {
- fprintf(stderr,"safe_mutex: Trying to cond_wait at %s, line %d on a not hold mutex\n",file,line);
- fflush(stderr);
- abort();
- }
- mp->count--; /* Mutex will be released */
- native_mutex_unlock(&mp->global);
- error= native_cond_timedwait(cond,&mp->mutex,abstime);
- #ifdef EXTRA_DEBUG
- if (error && (error != EINTR && error != ETIMEDOUT && error != ETIME))
- {
- fprintf(stderr,"safe_mutex: Got error: %d (%d) when doing a safe_cond_timedwait at %s, line %d\n", error, errno, file, line);
- }
- #endif
- native_mutex_lock(&mp->global);
- mp->thread= my_thread_self();
- if (mp->count++)
- {
- #ifndef NDEBUG
- fprintf(stderr,
- "safe_mutex: Count was %d in thread 0x%x when locking mutex at %s, line %d (error: %d (%d))\n",
- mp->count-1, my_thread_var_id(), file, line, error, error);
- fflush(stderr);
- #endif
- abort();
- }
- mp->file= file;
- mp->line=line;
- native_mutex_unlock(&mp->global);
- return error;
- }
-
- #endif
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