SDL_systls.c File Reference

#include "../../SDL_internal.h"
#include "SDL_thread.h"
#include "../SDL_systhread.h"
#include "../SDL_thread_c.h"
#include <pthread.h>

Include dependency graph for SDL_systls.c:

Go to the source code of this file.

Macros
#define	INVALID_PTHREAD_KEY   ((pthread_key_t)-1)

Functions
SDL_TLSData *	SDL_SYS_GetTLSData (void)
int	SDL_SYS_SetTLSData (SDL_TLSData *data)

Variables
static pthread_key_t	thread_local_storage = INVALID_PTHREAD_KEY
static SDL_bool	generic_local_storage = SDL_FALSE

Macro Definition Documentation

#define INVALID_PTHREAD_KEY   ((pthread_key_t)-1)

Definition at line 29 of file SDL_systls.c.

Referenced by SDL_SYS_GetTLSData().

Function Documentation

SDL_TLSData* SDL_SYS_GetTLSData

(

void

)

Definition at line 35 of file SDL_systls.c.

References generic_local_storage, INVALID_PTHREAD_KEY, lock, NULL, SDL_AtomicLock, SDL_AtomicUnlock, SDL_Generic_GetTLSData(), SDL_MemoryBarrierAcquire, SDL_MemoryBarrierRelease, SDL_TRUE, and thread_local_storage.

{
    if (thread_local_storage == INVALID_PTHREAD_KEY && !generic_local_storage) {
        static SDL_SpinLock lock;
        SDL_AtomicLock(&lock);
        if (thread_local_storage == INVALID_PTHREAD_KEY && !generic_local_storage) {
            pthread_key_t storage;
            if (pthread_key_create(&storage, NULL) == 0) {
                SDL_MemoryBarrierRelease();
                thread_local_storage = storage;
            } else {
                generic_local_storage = SDL_TRUE;
            }
        }
        SDL_AtomicUnlock(&lock);
    }
    if (generic_local_storage) {
        return SDL_Generic_GetTLSData();
    }
    SDL_MemoryBarrierAcquire();
    return (SDL_TLSData *)pthread_getspecific(thread_local_storage);
}

int SDL_SYS_SetTLSData

(

SDL_TLSData *

data

)

Definition at line 59 of file SDL_systls.c.

References generic_local_storage, SDL_Generic_SetTLSData(), SDL_SetError, and thread_local_storage.

{
    if (generic_local_storage) {
        return SDL_Generic_SetTLSData(data);
    }
    if (pthread_setspecific(thread_local_storage, data) != 0) {
        return SDL_SetError("pthread_setspecific() failed");
    }
    return 0;
}

Variable Documentation

SDL_bool generic_local_storage = SDL_FALSE

static

Definition at line 32 of file SDL_systls.c.

Referenced by SDL_SYS_GetTLSData(), and SDL_SYS_SetTLSData().

pthread_key_t thread_local_storage = INVALID_PTHREAD_KEY

static

Definition at line 31 of file SDL_systls.c.

Referenced by SDL_SYS_GetTLSData(), and SDL_SYS_SetTLSData().