rwsem.c

 1// SPDX-License-Identifier: GPL-2.0
 2#include "util.h"
 3#include "rwsem.h"
 4
 5#if RWS_ERRORCHECK
 6#include "mutex.h"
 7#endif
 8
 9int init_rwsem(struct rw_semaphore *sem)
10{
11#if RWS_ERRORCHECK
12	mutex_init(&sem->mtx);
13	return 0;
14#else
15	return pthread_rwlock_init(&sem->lock, NULL);
16#endif
17}
18
19int exit_rwsem(struct rw_semaphore *sem)
20{
21#if RWS_ERRORCHECK
22	mutex_destroy(&sem->mtx);
23	return 0;
24#else
25	return pthread_rwlock_destroy(&sem->lock);
26#endif
27}
28
29int down_read(struct rw_semaphore *sem)
30	NO_THREAD_SAFETY_ANALYSIS
31{
32#if RWS_ERRORCHECK
33	mutex_lock(&sem->mtx);
34	return 0;
35#else
36	return perf_singlethreaded ? 0 : pthread_rwlock_rdlock(&sem->lock);
37#endif
38}
39
40int up_read(struct rw_semaphore *sem)
41	NO_THREAD_SAFETY_ANALYSIS
42{
43#if RWS_ERRORCHECK
44	mutex_unlock(&sem->mtx);
45	return 0;
46#else
47	return perf_singlethreaded ? 0 : pthread_rwlock_unlock(&sem->lock);
48#endif
49}
50
51int down_write(struct rw_semaphore *sem)
52	NO_THREAD_SAFETY_ANALYSIS
53{
54#if RWS_ERRORCHECK
55	mutex_lock(&sem->mtx);
56	return 0;
57#else
58	return perf_singlethreaded ? 0 : pthread_rwlock_wrlock(&sem->lock);
59#endif
60}
61
62int up_write(struct rw_semaphore *sem)
63	NO_THREAD_SAFETY_ANALYSIS
64{
65#if RWS_ERRORCHECK
66	mutex_unlock(&sem->mtx);
67	return 0;
68#else
69	return perf_singlethreaded ? 0 : pthread_rwlock_unlock(&sem->lock);
70#endif
71}