1 /* Copyright (C) 2010-2020 The RetroArch team
3 * ---------------------------------------------------------------------------------------
4 * The following license statement only applies to this file (gx_pthread.h).
5 * ---------------------------------------------------------------------------------------
7 * Permission is hereby granted, free of charge,
8 * to any person obtaining a copy of this software and associated documentation files (the "Software"),
9 * to deal in the Software without restriction, including without limitation the rights to
10 * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software,
11 * and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
13 * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
16 * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
18 * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
19 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
20 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
23 #ifndef _CTR_PTHREAD_WRAP_CTR_
24 #define _CTR_PTHREAD_WRAP_CTR_
26 #include "3ds_utils.h"
31 #define STACKSIZE (4 * 1024)
34 #ifndef PTHREAD_SCOPE_PROCESS
35 /* An earlier version of devkitARM does not define the pthread types. Can remove in r54+. */
37 typedef Thread pthread_t;
38 typedef LightLock pthread_mutex_t;
39 typedef void* pthread_mutexattr_t;
40 typedef int pthread_attr_t;
41 typedef LightEvent pthread_cond_t;
42 typedef int pthread_condattr_t;
46 /* Backported CondVar API from libctru 2.0, and under its license:
47 https://github.com/devkitPro/libctru
48 Slightly modified for compatibility with older libctru. */
52 static inline Result syncArbitrateAddress(s32* addr, ArbitrationType type, s32 value)
54 return svcArbitrateAddress(__sync_get_arbiter(), (u32)addr, type, value, 0);
57 static inline Result syncArbitrateAddressWithTimeout(s32* addr, ArbitrationType type, s32 value, s64 timeout_ns)
59 return svcArbitrateAddress(__sync_get_arbiter(), (u32)addr, type, value, timeout_ns);
62 static inline void __dmb(void)
64 __asm__ __volatile__("mcr p15, 0, %[val], c7, c10, 5" :: [val] "r" (0) : "memory");
67 static inline void CondVar_BeginWait(CondVar* cv, LightLock* lock)
71 val = __ldrex(cv) - 1;
72 while (__strex(cv, val));
73 LightLock_Unlock(lock);
76 static inline bool CondVar_EndWait(CondVar* cv, s32 num_threads)
88 else if (val <= -num_threads)
93 } while (__strex(cv, val));
98 static inline void CondVar_Init(CondVar* cv)
103 static inline void CondVar_Wait(CondVar* cv, LightLock* lock)
105 CondVar_BeginWait(cv, lock);
106 syncArbitrateAddress(cv, ARBITRATION_WAIT_IF_LESS_THAN, 0);
107 LightLock_Lock(lock);
110 static inline int CondVar_WaitTimeout(CondVar* cv, LightLock* lock, s64 timeout_ns)
112 CondVar_BeginWait(cv, lock);
114 bool timedOut = false;
115 Result rc = syncArbitrateAddressWithTimeout(cv, ARBITRATION_WAIT_IF_LESS_THAN_TIMEOUT, 0, timeout_ns);
116 if (R_DESCRIPTION(rc) == RD_TIMEOUT)
118 timedOut = CondVar_EndWait(cv, 1);
122 LightLock_Lock(lock);
126 static inline void CondVar_WakeUp(CondVar* cv, s32 num_threads)
129 if (CondVar_EndWait(cv, num_threads))
130 syncArbitrateAddress(cv, ARBITRATION_SIGNAL, num_threads);
135 static inline void CondVar_Signal(CondVar* cv)
137 CondVar_WakeUp(cv, 1);
140 static inline void CondVar_Broadcast(CondVar* cv)
142 CondVar_WakeUp(cv, ARBITRATION_SIGNAL_ALL);
144 /* End libctru 2.0 backport */
147 /* libctru threads return void but pthreads return void pointer */
148 static bool mutex_inited = false;
149 static LightLock safe_double_thread_launch;
150 static void *(*start_routine_jump)(void*);
152 static void ctr_thread_launcher(void* data)
154 void *(*start_routine_jump_safe)(void*) = start_routine_jump;
155 LightLock_Unlock(&safe_double_thread_launch);
156 start_routine_jump_safe(data);
159 static inline int pthread_create(pthread_t *thread,
160 const pthread_attr_t *attr, void *(*start_routine)(void*), void *arg)
163 Thread new_ctr_thread;
164 int procnum = -2; // use default cpu
167 APT_CheckNew3DS(&isNew3DS);
174 LightLock_Init(&safe_double_thread_launch);
178 /*Must wait if attempting to launch 2 threads at once to prevent corruption of function pointer*/
179 while (LightLock_TryLock(&safe_double_thread_launch) != 0);
181 svcGetThreadPriority(&prio, CUR_THREAD_HANDLE);
183 start_routine_jump = start_routine;
184 new_ctr_thread = threadCreate(ctr_thread_launcher, arg, STACKSIZE, prio - 1, procnum, FALSE);
188 LightLock_Unlock(&safe_double_thread_launch);
192 *thread = (pthread_t)new_ctr_thread;
196 static inline pthread_t pthread_self(void)
198 return (pthread_t)threadGetCurrent();
201 static inline int pthread_mutex_init(pthread_mutex_t *mutex,
202 const pthread_mutexattr_t *attr)
204 LightLock_Init((LightLock *)mutex);
208 static inline int pthread_mutex_destroy(pthread_mutex_t *mutex)
210 /*Nothing to destroy*/
214 static inline int pthread_mutex_lock(pthread_mutex_t *mutex)
216 LightLock_Lock((LightLock *)mutex);
220 static inline int pthread_mutex_unlock(pthread_mutex_t *mutex)
222 LightLock_Unlock((LightLock *)mutex);
226 static inline void pthread_exit(void *retval)
228 /*Yes the pointer to int cast is not ideal*/
229 /*threadExit((int)retval);*/
235 static inline int pthread_detach(pthread_t thread)
237 threadDetach((Thread)thread);
241 static inline int pthread_join(pthread_t thread, void **retval)
243 /*retval is ignored*/
244 if(threadJoin((Thread)thread, INT64_MAX))
247 threadFree((Thread)thread);
252 static inline int pthread_mutex_trylock(pthread_mutex_t *mutex)
254 return LightLock_TryLock((LightLock *)mutex);
257 static inline int pthread_cond_wait(pthread_cond_t *cond,
258 pthread_mutex_t *mutex)
260 CondVar_Wait((CondVar *)cond, (LightLock *)mutex);
264 static inline int pthread_cond_timedwait(pthread_cond_t *cond,
265 pthread_mutex_t *mutex, const struct timespec *abstime)
267 struct timespec now = {0};
268 /* Missing clock_gettime*/
272 gettimeofday(&tm, NULL);
273 now.tv_sec = tm.tv_sec;
274 now.tv_nsec = tm.tv_usec * 1000;
275 s64 timeout = (abstime->tv_sec - now.tv_sec) * 1000000000 + (abstime->tv_nsec - now.tv_nsec);
281 else if (CondVar_WaitTimeout((CondVar *)cond, (LightLock *)mutex, timeout))
289 static inline int pthread_cond_init(pthread_cond_t *cond,
290 const pthread_condattr_t *attr)
292 CondVar_Init((CondVar *)cond);
296 static inline int pthread_cond_signal(pthread_cond_t *cond)
298 CondVar_Signal((CondVar *)cond);
302 static inline int pthread_cond_broadcast(pthread_cond_t *cond)
304 CondVar_Broadcast((CondVar *)cond);
308 static inline int pthread_cond_destroy(pthread_cond_t *cond)
310 /*Nothing to destroy*/
314 static inline int pthread_equal(pthread_t t1, pthread_t t2)
316 if (threadGetHandle((Thread)t1) == threadGetHandle((Thread)t2))