| #include <stdlib.h> |
| #include <string.h> |
| #include "eglcurrent.h" |
| #include "eglcontext.h" |
| #include "egllog.h" |
| #include "eglmutex.h" |
| #include "eglglobals.h" |
| |
| |
| /* This should be kept in sync with _eglInitThreadInfo() */ |
| #define _EGL_THREAD_INFO_INITIALIZER \ |
| { EGL_SUCCESS, { NULL }, 0 } |
| |
| /* a fallback thread info to guarantee that every thread always has one */ |
| static _EGLThreadInfo dummy_thread = _EGL_THREAD_INFO_INITIALIZER; |
| |
| |
| #ifdef GLX_USE_TLS |
| static __thread const _EGLThreadInfo *_egl_TSD |
| __attribute__ ((tls_model("initial-exec"))); |
| |
| static INLINE void _eglSetTSD(const _EGLThreadInfo *t) |
| { |
| _egl_TSD = t; |
| } |
| |
| static INLINE _EGLThreadInfo *_eglGetTSD(void) |
| { |
| return (_EGLThreadInfo *) _egl_TSD; |
| } |
| |
| static INLINE void _eglFiniTSD(void) |
| { |
| } |
| |
| static INLINE EGLBoolean _eglInitTSD(void (*dtor)(_EGLThreadInfo *)) |
| { |
| /* TODO destroy TSD */ |
| (void) dtor; |
| (void) _eglFiniTSD; |
| return EGL_TRUE; |
| } |
| |
| #elif PTHREADS |
| #include <pthread.h> |
| |
| static _EGL_DECLARE_MUTEX(_egl_TSDMutex); |
| static EGLBoolean _egl_TSDInitialized; |
| static pthread_key_t _egl_TSD; |
| static void (*_egl_FreeTSD)(_EGLThreadInfo *); |
| |
| static INLINE void _eglSetTSD(const _EGLThreadInfo *t) |
| { |
| pthread_setspecific(_egl_TSD, (const void *) t); |
| } |
| |
| static INLINE _EGLThreadInfo *_eglGetTSD(void) |
| { |
| return (_EGLThreadInfo *) pthread_getspecific(_egl_TSD); |
| } |
| |
| static INLINE void _eglFiniTSD(void) |
| { |
| _eglLockMutex(&_egl_TSDMutex); |
| if (_egl_TSDInitialized) { |
| _EGLThreadInfo *t = _eglGetTSD(); |
| |
| _egl_TSDInitialized = EGL_FALSE; |
| if (t && _egl_FreeTSD) |
| _egl_FreeTSD((void *) t); |
| pthread_key_delete(_egl_TSD); |
| } |
| _eglUnlockMutex(&_egl_TSDMutex); |
| } |
| |
| static INLINE EGLBoolean _eglInitTSD(void (*dtor)(_EGLThreadInfo *)) |
| { |
| if (!_egl_TSDInitialized) { |
| _eglLockMutex(&_egl_TSDMutex); |
| |
| /* check again after acquiring lock */ |
| if (!_egl_TSDInitialized) { |
| if (pthread_key_create(&_egl_TSD, (void (*)(void *)) dtor) != 0) { |
| _eglUnlockMutex(&_egl_TSDMutex); |
| return EGL_FALSE; |
| } |
| _egl_FreeTSD = dtor; |
| _eglAddAtExitCall(_eglFiniTSD); |
| _egl_TSDInitialized = EGL_TRUE; |
| } |
| |
| _eglUnlockMutex(&_egl_TSDMutex); |
| } |
| |
| return EGL_TRUE; |
| } |
| |
| #else /* PTHREADS */ |
| static const _EGLThreadInfo *_egl_TSD; |
| static void (*_egl_FreeTSD)(_EGLThreadInfo *); |
| |
| static INLINE void _eglSetTSD(const _EGLThreadInfo *t) |
| { |
| _egl_TSD = t; |
| } |
| |
| static INLINE _EGLThreadInfo *_eglGetTSD(void) |
| { |
| return (_EGLThreadInfo *) _egl_TSD; |
| } |
| |
| static INLINE void _eglFiniTSD(void) |
| { |
| if (_egl_FreeTSD && _egl_TSD) |
| _egl_FreeTSD((_EGLThreadInfo *) _egl_TSD); |
| } |
| |
| static INLINE EGLBoolean _eglInitTSD(void (*dtor)(_EGLThreadInfo *)) |
| { |
| if (!_egl_FreeTSD && dtor) { |
| _egl_FreeTSD = dtor; |
| _eglAddAtExitCall(_eglFiniTSD); |
| } |
| return EGL_TRUE; |
| } |
| |
| #endif /* !PTHREADS */ |
| |
| |
| static void |
| _eglInitThreadInfo(_EGLThreadInfo *t) |
| { |
| memset(t, 0, sizeof(*t)); |
| t->LastError = EGL_SUCCESS; |
| /* default, per EGL spec */ |
| t->CurrentAPIIndex = _eglConvertApiToIndex(EGL_OPENGL_ES_API); |
| } |
| |
| |
| /** |
| * Allocate and init a new _EGLThreadInfo object. |
| */ |
| static _EGLThreadInfo * |
| _eglCreateThreadInfo(void) |
| { |
| _EGLThreadInfo *t = (_EGLThreadInfo *) calloc(1, sizeof(_EGLThreadInfo)); |
| if (t) |
| _eglInitThreadInfo(t); |
| else |
| t = &dummy_thread; |
| return t; |
| } |
| |
| |
| /** |
| * Delete/free a _EGLThreadInfo object. |
| */ |
| static void |
| _eglDestroyThreadInfo(_EGLThreadInfo *t) |
| { |
| if (t != &dummy_thread) |
| free(t); |
| } |
| |
| |
| /** |
| * Make sure TSD is initialized and return current value. |
| */ |
| static INLINE _EGLThreadInfo * |
| _eglCheckedGetTSD(void) |
| { |
| if (_eglInitTSD(&_eglDestroyThreadInfo) != EGL_TRUE) { |
| _eglLog(_EGL_FATAL, "failed to initialize \"current\" system"); |
| return NULL; |
| } |
| |
| return _eglGetTSD(); |
| } |
| |
| |
| /** |
| * Return the calling thread's thread info. |
| * If the calling thread nevers calls this function before, or if its thread |
| * info was destroyed, a new one is created. This function never returns NULL. |
| * In the case allocation fails, a dummy one is returned. See also |
| * _eglIsCurrentThreadDummy. |
| */ |
| _EGLThreadInfo * |
| _eglGetCurrentThread(void) |
| { |
| _EGLThreadInfo *t = _eglCheckedGetTSD(); |
| if (!t) { |
| t = _eglCreateThreadInfo(); |
| _eglSetTSD(t); |
| } |
| |
| return t; |
| } |
| |
| |
| /** |
| * Destroy the calling thread's thread info. |
| */ |
| void |
| _eglDestroyCurrentThread(void) |
| { |
| _EGLThreadInfo *t = _eglCheckedGetTSD(); |
| if (t) { |
| _eglDestroyThreadInfo(t); |
| _eglSetTSD(NULL); |
| } |
| } |
| |
| |
| /** |
| * Return true if the calling thread's thread info is dummy. |
| * A dummy thread info is shared by all threads and should not be modified. |
| * Functions like eglBindAPI or eglMakeCurrent should check for dummy-ness |
| * before updating the thread info. |
| */ |
| EGLBoolean |
| _eglIsCurrentThreadDummy(void) |
| { |
| _EGLThreadInfo *t = _eglCheckedGetTSD(); |
| return (!t || t == &dummy_thread); |
| } |
| |
| |
| /** |
| * Return the currently bound context, or NULL. |
| */ |
| _EGLContext * |
| _eglGetCurrentContext(void) |
| { |
| _EGLThreadInfo *t = _eglGetCurrentThread(); |
| return t->CurrentContexts[t->CurrentAPIIndex]; |
| } |
| |
| |
| /** |
| * Return the display of the currently bound context, or NULL. |
| */ |
| _EGLDisplay * |
| _eglGetCurrentDisplay(void) |
| { |
| _EGLThreadInfo *t = _eglGetCurrentThread(); |
| _EGLContext *ctx = t->CurrentContexts[t->CurrentAPIIndex]; |
| if (ctx) |
| return ctx->Display; |
| else |
| return NULL; |
| } |
| |
| |
| /** |
| * Return the read or write surface of the currently bound context, or NULL. |
| */ |
| _EGLSurface * |
| _eglGetCurrentSurface(EGLint readdraw) |
| { |
| _EGLThreadInfo *t = _eglGetCurrentThread(); |
| _EGLContext *ctx = t->CurrentContexts[t->CurrentAPIIndex]; |
| if (ctx) { |
| switch (readdraw) { |
| case EGL_DRAW: |
| return ctx->DrawSurface; |
| case EGL_READ: |
| return ctx->ReadSurface; |
| default: |
| return NULL; |
| } |
| } |
| return NULL; |
| } |
| |
| |
| /** |
| * Record EGL error code. |
| */ |
| EGLBoolean |
| _eglError(EGLint errCode, const char *msg) |
| { |
| _EGLThreadInfo *t = _eglGetCurrentThread(); |
| const char *s; |
| |
| if (t == &dummy_thread) |
| return EGL_FALSE; |
| |
| if (t->LastError == EGL_SUCCESS) { |
| t->LastError = errCode; |
| |
| switch (errCode) { |
| case EGL_BAD_ACCESS: |
| s = "EGL_BAD_ACCESS"; |
| break; |
| case EGL_BAD_ALLOC: |
| s = "EGL_BAD_ALLOC"; |
| break; |
| case EGL_BAD_ATTRIBUTE: |
| s = "EGL_BAD_ATTRIBUTE"; |
| break; |
| case EGL_BAD_CONFIG: |
| s = "EGL_BAD_CONFIG"; |
| break; |
| case EGL_BAD_CONTEXT: |
| s = "EGL_BAD_CONTEXT"; |
| break; |
| case EGL_BAD_CURRENT_SURFACE: |
| s = "EGL_BAD_CURRENT_SURFACE"; |
| break; |
| case EGL_BAD_DISPLAY: |
| s = "EGL_BAD_DISPLAY"; |
| break; |
| case EGL_BAD_MATCH: |
| s = "EGL_BAD_MATCH"; |
| break; |
| case EGL_BAD_NATIVE_PIXMAP: |
| s = "EGL_BAD_NATIVE_PIXMAP"; |
| break; |
| case EGL_BAD_NATIVE_WINDOW: |
| s = "EGL_BAD_NATIVE_WINDOW"; |
| break; |
| case EGL_BAD_PARAMETER: |
| s = "EGL_BAD_PARAMETER"; |
| break; |
| case EGL_BAD_SURFACE: |
| s = "EGL_BAD_SURFACE"; |
| break; |
| case EGL_BAD_SCREEN_MESA: |
| s = "EGL_BAD_SCREEN_MESA"; |
| break; |
| case EGL_BAD_MODE_MESA: |
| s = "EGL_BAD_MODE_MESA"; |
| break; |
| default: |
| s = "other"; |
| } |
| _eglLog(_EGL_DEBUG, "EGL user error 0x%x (%s) in %s\n", errCode, s, msg); |
| } |
| |
| return EGL_FALSE; |
| } |