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// Copyright © Tavian Barnes <tavianator@tavianator.com>
// SPDX-License-Identifier: 0BSD
/**
* Wrappers for POSIX threading APIs.
*/
#ifndef BFS_THREAD_H
#define BFS_THREAD_H
#include "config.h"
#include "diag.h"
#include <errno.h>
#include <pthread.h>
#include <string.h>
#if __STDC_VERSION__ < 202311L && !defined(thread_local)
# if BFS_USE_THREADS_H
# include <threads.h>
# else
# define thread_local _Thread_local
# endif
#endif
#define thread_verify(expr, cond) \
bfs_verify((errno = (expr), (cond)), "%s: %s", #expr, strerror(errno))
/**
* Wrapper for pthread_create().
*
* @return
* 0 on success, -1 on error.
*/
#define thread_create(thread, attr, fn, arg) \
((errno = pthread_create(thread, attr, fn, arg)) ? -1 : 0)
/**
* Wrapper for pthread_join().
*/
#define thread_join(thread, ret) \
thread_verify(pthread_join(thread, ret), errno == 0)
/**
* Wrapper for pthread_mutex_init().
*/
#define mutex_init(mutex, attr) \
((errno = pthread_mutex_init(mutex, attr)) ? -1 : 0)
/**
* Wrapper for pthread_mutex_lock().
*/
#define mutex_lock(mutex) \
thread_verify(pthread_mutex_lock(mutex), errno == 0)
/**
* Wrapper for pthread_mutex_trylock().
*
* @return
* Whether the mutex was locked.
*/
#define mutex_trylock(mutex) \
(thread_verify(pthread_mutex_trylock(mutex), errno == 0 || errno == EBUSY), errno == 0)
/**
* Wrapper for pthread_mutex_unlock().
*/
#define mutex_unlock(mutex) \
thread_verify(pthread_mutex_unlock(mutex), errno == 0)
/**
* Wrapper for pthread_mutex_destroy().
*/
#define mutex_destroy(mutex) \
thread_verify(pthread_mutex_destroy(mutex), errno == 0)
/**
* Wrapper for pthread_cond_init().
*/
#define cond_init(cond, attr) \
((errno = pthread_cond_init(cond, attr)) ? -1 : 0)
/**
* Wrapper for pthread_cond_wait().
*/
#define cond_wait(cond, mutex) \
thread_verify(pthread_cond_wait(cond, mutex), errno == 0)
/**
* Wrapper for pthread_cond_signal().
*/
#define cond_signal(cond) \
thread_verify(pthread_cond_signal(cond), errno == 0)
/**
* Wrapper for pthread_cond_broadcast().
*/
#define cond_broadcast(cond) \
thread_verify(pthread_cond_broadcast(cond), errno == 0)
/**
* Wrapper for pthread_cond_destroy().
*/
#define cond_destroy(cond) \
thread_verify(pthread_cond_destroy(cond), errno == 0)
/**
* Wrapper for pthread_once().
*/
#define invoke_once(once, fn) \
thread_verify(pthread_once(once, fn), errno == 0)
#endif // BFS_THREAD_H
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