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Add optional suffix _generic to generic SDL_cond impl

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Allows for runtime selectable implementation
This commit is contained in:
Joel Linn 2020-12-28 11:42:49 -08:00
parent 7539ac8087
commit 2443e51e0e
15 changed files with 205 additions and 15 deletions
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45
src/thread/generic/SDL_syscond.c
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@ -28,41 +28,57 @@
#include "SDL_thread.h"
struct SDL_cond
#include "../generic/SDL_syscond_c.h"
/* If two implementations are to be compiled into SDL (the active one
* will be chosen at runtime), the function names need to be
* suffixed
*/
#if !SDL_THREAD_GENERIC_COND_SUFFIX
#define SDL_CreateCond_generic SDL_CreateCond
#define SDL_DestroyCond_generic SDL_DestroyCond
#define SDL_CondSignal_generic SDL_CondSignal
#define SDL_CondBroadcast_generic SDL_CondBroadcast
#define SDL_CondWait_generic SDL_CondWait
#define SDL_CondWaitTimeout_generic SDL_CondWaitTimeout
#endif
typedef struct SDL_cond_generic
{
SDL_mutex *lock;
int waiting;
int signals;
SDL_sem *wait_sem;
SDL_sem *wait_done;
};
} SDL_cond_generic;
/* Create a condition variable */
SDL_cond *
SDL_CreateCond(void)
SDL_CreateCond_generic(void)
{
SDL_cond *cond;
SDL_cond_generic *cond;
cond = (SDL_cond *) SDL_malloc(sizeof(SDL_cond));
cond = (SDL_cond_generic *) SDL_malloc(sizeof(SDL_cond_generic));
if (cond) {
cond->lock = SDL_CreateMutex();
cond->wait_sem = SDL_CreateSemaphore(0);
cond->wait_done = SDL_CreateSemaphore(0);
cond->waiting = cond->signals = 0;
if (!cond->lock || !cond->wait_sem || !cond->wait_done) {
SDL_DestroyCond(cond);
SDL_DestroyCond_generic((SDL_cond *)cond);
cond = NULL;
}
} else {
SDL_OutOfMemory();
}
return (cond);
return (SDL_cond *)cond;
}
/* Destroy a condition variable */
void
SDL_DestroyCond(SDL_cond * cond)
SDL_DestroyCond_generic(SDL_cond * _cond)
{
SDL_cond_generic *cond = (SDL_cond_generic *)_cond;
if (cond) {
if (cond->wait_sem) {
SDL_DestroySemaphore(cond->wait_sem);
@ -79,8 +95,9 @@ SDL_DestroyCond(SDL_cond * cond)
/* Restart one of the threads that are waiting on the condition variable */
int
SDL_CondSignal(SDL_cond * cond)
SDL_CondSignal_generic(SDL_cond * _cond)
{
SDL_cond_generic *cond = (SDL_cond_generic *)_cond;
if (!cond) {
return SDL_SetError("Passed a NULL condition variable");
}
@ -103,8 +120,9 @@ SDL_CondSignal(SDL_cond * cond)
/* Restart all threads that are waiting on the condition variable */
int
SDL_CondBroadcast(SDL_cond * cond)
SDL_CondBroadcast_generic(SDL_cond * _cond)
{
SDL_cond_generic *cond = (SDL_cond_generic *)_cond;
if (!cond) {
return SDL_SetError("Passed a NULL condition variable");
}
@ -157,8 +175,9 @@ Thread B:
SDL_UnlockMutex(lock);
*/
int
SDL_CondWaitTimeout(SDL_cond * cond, SDL_mutex * mutex, Uint32 ms)
SDL_CondWaitTimeout_generic(SDL_cond * _cond, SDL_mutex * mutex, Uint32 ms)
{
SDL_cond_generic *cond = (SDL_cond_generic *)_cond;
int retval;
if (!cond) {
@ -212,9 +231,9 @@ SDL_CondWaitTimeout(SDL_cond * cond, SDL_mutex * mutex, Uint32 ms)
/* Wait on the condition variable forever */
int
SDL_CondWait(SDL_cond * cond, SDL_mutex * mutex)
SDL_CondWait_generic(SDL_cond * cond, SDL_mutex * mutex)
{
return SDL_CondWaitTimeout(cond, mutex, SDL_MUTEX_MAXWAIT);
return SDL_CondWaitTimeout_generic(cond, mutex, SDL_MUTEX_MAXWAIT);
}
/* vi: set ts=4 sw=4 expandtab: */