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/*
* librdkafka - Apache Kafka C library
*
* Copyright (c) 2018 Magnus Edenhill
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
/**
* @brief Extra methods added to tinychtread/c11threads
*/
#ifndef _TINYCTHREAD_EXTRA_H_
#define _TINYCTHREAD_EXTRA_H_
#ifndef _WIN32
#include <pthread.h> /* needed for rwlock_t */
#endif
/**
* @brief Set thread system name if platform supports it (pthreads)
* @return thrd_success or thrd_error
*/
int thrd_setname(const char *name);
/**
* @brief Checks if passed thread is the current thread.
* @return non-zero if same thread, else 0.
*/
int thrd_is_current(thrd_t thr);
#ifdef _WIN32
/**
* @brief Mark the current thread as waiting on cnd.
*
* @remark This is to be used when the thread uses its own
* WaitForMultipleEvents() call rather than cnd_timedwait().
*
* @sa cnd_wait_exit()
*/
void cnd_wait_enter(cnd_t *cond);
/**
* @brief Mark the current thread as no longer waiting on cnd.
*/
void cnd_wait_exit(cnd_t *cond);
#endif
/**
* @brief Same as cnd_timedwait() but takes a relative timeout in milliseconds.
*/
int cnd_timedwait_ms(cnd_t *cnd, mtx_t *mtx, int timeout_ms);
/**
* @brief Same as cnd_timedwait_ms() but updates the remaining time.
*/
int cnd_timedwait_msp(cnd_t *cnd, mtx_t *mtx, int *timeout_msp);
/**
* @brief Same as cnd_timedwait() but honours
* RD_POLL_INFINITE (uses cnd_wait()),
* and RD_POLL_NOWAIT (return thrd_timedout immediately).
*
* @remark Set up \p tspec with rd_timeout_init_timespec().
*/
int cnd_timedwait_abs(cnd_t *cnd, mtx_t *mtx, const struct timespec *tspec);
/**
* @brief Read-write locks
*/
#if defined(_TTHREAD_WIN32_)
typedef struct rwlock_t {
SRWLOCK lock;
LONG rcnt;
LONG wcnt;
} rwlock_t;
#define rwlock_init(rwl) \
do { \
(rwl)->rcnt = (rwl)->wcnt = 0; \
InitializeSRWLock(&(rwl)->lock); \
} while (0)
#define rwlock_destroy(rwl)
#define rwlock_rdlock(rwl) \
do { \
if (0) \
printf("Thr %i: at %i: RDLOCK %p %s (%i, %i)\n", \
GetCurrentThreadId(), __LINE__, rwl, \
__FUNCTION__, (rwl)->rcnt, (rwl)->wcnt); \
assert((rwl)->rcnt >= 0 && (rwl)->wcnt >= 0); \
AcquireSRWLockShared(&(rwl)->lock); \
InterlockedIncrement(&(rwl)->rcnt); \
} while (0)
#define rwlock_wrlock(rwl) \
do { \
if (0) \
printf("Thr %i: at %i: WRLOCK %p %s (%i, %i)\n", \
GetCurrentThreadId(), __LINE__, rwl, \
__FUNCTION__, (rwl)->rcnt, (rwl)->wcnt); \
assert((rwl)->rcnt >= 0 && (rwl)->wcnt >= 0); \
AcquireSRWLockExclusive(&(rwl)->lock); \
InterlockedIncrement(&(rwl)->wcnt); \
} while (0)
#define rwlock_rdunlock(rwl) \
do { \
if (0) \
printf("Thr %i: at %i: RDUNLOCK %p %s (%i, %i)\n", \
GetCurrentThreadId(), __LINE__, rwl, \
__FUNCTION__, (rwl)->rcnt, (rwl)->wcnt); \
assert((rwl)->rcnt > 0 && (rwl)->wcnt >= 0); \
ReleaseSRWLockShared(&(rwl)->lock); \
InterlockedDecrement(&(rwl)->rcnt); \
} while (0)
#define rwlock_wrunlock(rwl) \
do { \
if (0) \
printf("Thr %i: at %i: RWUNLOCK %p %s (%i, %i)\n", \
GetCurrentThreadId(), __LINE__, rwl, \
__FUNCTION__, (rwl)->rcnt, (rwl)->wcnt); \
assert((rwl)->rcnt >= 0 && (rwl)->wcnt > 0); \
ReleaseSRWLockExclusive(&(rwl)->lock); \
InterlockedDecrement(&(rwl)->wcnt); \
} while (0)
#define rwlock_rdlock_d(rwl) \
do { \
if (1) \
printf("Thr %i: at %i: RDLOCK %p %s (%i, %i)\n", \
GetCurrentThreadId(), __LINE__, rwl, \
__FUNCTION__, (rwl)->rcnt, (rwl)->wcnt); \
assert((rwl)->rcnt >= 0 && (rwl)->wcnt >= 0); \
AcquireSRWLockShared(&(rwl)->lock); \
InterlockedIncrement(&(rwl)->rcnt); \
} while (0)
#define rwlock_wrlock_d(rwl) \
do { \
if (1) \
printf("Thr %i: at %i: WRLOCK %p %s (%i, %i)\n", \
GetCurrentThreadId(), __LINE__, rwl, \
__FUNCTION__, (rwl)->rcnt, (rwl)->wcnt); \
assert((rwl)->rcnt >= 0 && (rwl)->wcnt >= 0); \
AcquireSRWLockExclusive(&(rwl)->lock); \
InterlockedIncrement(&(rwl)->wcnt); \
} while (0)
#define rwlock_rdunlock_d(rwl) \
do { \
if (1) \
printf("Thr %i: at %i: RDUNLOCK %p %s (%i, %i)\n", \
GetCurrentThreadId(), __LINE__, rwl, \
__FUNCTION__, (rwl)->rcnt, (rwl)->wcnt); \
assert((rwl)->rcnt > 0 && (rwl)->wcnt >= 0); \
ReleaseSRWLockShared(&(rwl)->lock); \
InterlockedDecrement(&(rwl)->rcnt); \
} while (0)
#define rwlock_wrunlock_d(rwl) \
do { \
if (1) \
printf("Thr %i: at %i: RWUNLOCK %p %s (%i, %i)\n", \
GetCurrentThreadId(), __LINE__, rwl, \
__FUNCTION__, (rwl)->rcnt, (rwl)->wcnt); \
assert((rwl)->rcnt >= 0 && (rwl)->wcnt > 0); \
ReleaseSRWLockExclusive(&(rwl)->lock); \
InterlockedDecrement(&(rwl)->wcnt); \
} while (0)
#else
typedef pthread_rwlock_t rwlock_t;
int rwlock_init(rwlock_t *rwl);
int rwlock_destroy(rwlock_t *rwl);
int rwlock_rdlock(rwlock_t *rwl);
int rwlock_wrlock(rwlock_t *rwl);
int rwlock_rdunlock(rwlock_t *rwl);
int rwlock_wrunlock(rwlock_t *rwl);
#endif
#endif /* _TINYCTHREAD_EXTRA_H_ */
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