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Diffstat (limited to 'src/mesa/main/syncobj.c')
| -rw-r--r-- | src/mesa/main/syncobj.c | 409 |
1 files changed, 409 insertions, 0 deletions
diff --git a/src/mesa/main/syncobj.c b/src/mesa/main/syncobj.c new file mode 100644 index 00000000000..ac3f9eb1752 --- /dev/null +++ b/src/mesa/main/syncobj.c @@ -0,0 +1,409 @@ +/* + * Copyright © 2009 Intel Corporation + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice (including the next + * paragraph) shall be included in all copies or substantial portions of the + * Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER + * DEALINGS IN THE SOFTWARE. + */ + +/** + * \file syncobj.c + * Sync object management. + * + * Unlike textures and other objects that are shared between contexts, sync + * objects are not bound to the context. As a result, the reference counting + * and delete behavior of sync objects is slightly different. References to + * sync objects are added: + * + * - By \c glFencSynce. This sets the initial reference count to 1. + * - At the start of \c glClientWaitSync. The reference is held for the + * duration of the wait call. + * + * References are removed: + * + * - By \c glDeleteSync. + * - At the end of \c glClientWaitSync. + * + * Additionally, drivers may call \c _mesa_ref_sync_object and + * \c _mesa_unref_sync_object as needed to implement \c ServerWaitSync. + * + * As with shader objects, sync object names become invalid as soon as + * \c glDeleteSync is called. For this reason \c glDeleteSync sets the + * \c DeletePending flag. All functions validate object handles by testing + * this flag. + * + * \note + * Only \c GL_ARB_sync objects are shared between contexts. If support is ever + * added for either \c GL_NV_fence or \c GL_APPLE_fence different semantics + * will need to be implemented. + * + * \author Ian Romanick <[email protected]> + */ + +#include "glheader.h" +#include "imports.h" +#include "context.h" +#include "macros.h" + +#if FEATURE_ARB_sync +#include "syncobj.h" + +static struct gl_sync_object * +_mesa_new_sync_object(GLcontext *ctx, GLenum type) +{ + struct gl_sync_object *s = MALLOC_STRUCT(gl_sync_object); + (void) ctx; + (void) type; + + return s; +} + + +static void +_mesa_delete_sync_object(GLcontext *ctx, struct gl_sync_object *syncObj) +{ + (void) ctx; + _mesa_free(syncObj); +} + + +static void +_mesa_fence_sync(GLcontext *ctx, struct gl_sync_object *syncObj, + GLenum condition, GLbitfield flags) +{ + (void) ctx; + (void) condition; + (void) flags; + + syncObj->StatusFlag = 1; +} + + +static void +_mesa_check_sync(GLcontext *ctx, struct gl_sync_object *syncObj) +{ + (void) ctx; + (void) syncObj; + + /* No-op for software rendering. Hardware drivers will need to determine + * whether the state of the sync object has changed. + */ +} + + +static void +_mesa_wait_sync(GLcontext *ctx, struct gl_sync_object *syncObj, + GLbitfield flags, GLuint64 timeout) +{ + (void) ctx; + (void) syncObj; + (void) flags; + (void) timeout; + + /* No-op for software rendering. Hardware drivers will need to wait until + * the state of the sync object changes or the timeout expires. + */ +} + + +void +_mesa_init_sync_object_functions(struct dd_function_table *driver) +{ + driver->NewSyncObject = _mesa_new_sync_object; + driver->FenceSync = _mesa_fence_sync; + driver->DeleteSyncObject = _mesa_delete_sync_object; + driver->CheckSync = _mesa_check_sync; + + /* Use the same no-op wait function for both. + */ + driver->ClientWaitSync = _mesa_wait_sync; + driver->ServerWaitSync = _mesa_wait_sync; +} + + +/** + * Allocate/init the context state related to sync objects. + */ +void +_mesa_init_sync(GLcontext *ctx) +{ + (void) ctx; +} + + +/** + * Free the context state related to sync objects. + */ +void +_mesa_free_sync_data(GLcontext *ctx) +{ + (void) ctx; +} + + +static int +_mesa_validate_sync(struct gl_sync_object *syncObj) +{ + return (syncObj != NULL) + && (syncObj->Type == GL_SYNC_FENCE) + && !syncObj->DeletePending; +} + + +void +_mesa_ref_sync_object(GLcontext *ctx, struct gl_sync_object *syncObj) +{ + _glthread_LOCK_MUTEX(ctx->Shared->Mutex); + syncObj->RefCount++; + _glthread_UNLOCK_MUTEX(ctx->Shared->Mutex); +} + + +void +_mesa_unref_sync_object(GLcontext *ctx, struct gl_sync_object *syncObj) +{ + _glthread_LOCK_MUTEX(ctx->Shared->Mutex); + syncObj->RefCount--; + if (syncObj->RefCount == 0) { + remove_from_list(& syncObj->link); + _glthread_UNLOCK_MUTEX(ctx->Shared->Mutex); + + ctx->Driver.DeleteSyncObject(ctx, syncObj); + } else { + _glthread_UNLOCK_MUTEX(ctx->Shared->Mutex); + } +} + + +GLboolean GLAPIENTRY +_mesa_IsSync(GLsync sync) +{ + GET_CURRENT_CONTEXT(ctx); + struct gl_sync_object *const syncObj = (struct gl_sync_object *) sync; + ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, GL_FALSE); + + return _mesa_validate_sync(syncObj) ? GL_TRUE : GL_FALSE; +} + + +void GLAPIENTRY +_mesa_DeleteSync(GLsync sync) +{ + GET_CURRENT_CONTEXT(ctx); + struct gl_sync_object *const syncObj = (struct gl_sync_object *) sync; + ASSERT_OUTSIDE_BEGIN_END(ctx); + + /* From the GL_ARB_sync spec: + * + * DeleteSync will silently ignore a <sync> value of zero. An + * INVALID_VALUE error is generated if <sync> is neither zero nor the + * name of a sync object. + */ + if (sync == 0) { + return; + } + + if (!_mesa_validate_sync(syncObj)) { + _mesa_error(ctx, GL_INVALID_OPERATION, "glDeleteSync"); + return; + } + + /* If there are no client-waits or server-waits pending on this sync, delete + * the underlying object. + */ + syncObj->DeletePending = GL_TRUE; + _mesa_unref_sync_object(ctx, syncObj); +} + + +GLsync GLAPIENTRY +_mesa_FenceSync(GLenum condition, GLbitfield flags) +{ + GET_CURRENT_CONTEXT(ctx); + struct gl_sync_object *syncObj; + ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, 0); + + if (condition != GL_SYNC_GPU_COMMANDS_COMPLETE) { + _mesa_error(ctx, GL_INVALID_ENUM, "glFenceSync(condition=0x%x)", + condition); + return 0; + } + + if (flags != 0) { + _mesa_error(ctx, GL_INVALID_VALUE, "glFenceSync(flags=0x%x)", + condition); + return 0; + } + + syncObj = ctx->Driver.NewSyncObject(ctx, GL_SYNC_FENCE); + if (syncObj != NULL) { + syncObj->Type = GL_SYNC_FENCE; + /* The name is not currently used, and it is never visible to + * applications. If sync support is extended to provide support for + * NV_fence, this field will be used. We'll also need to add an object + * ID hashtable. + */ + syncObj->Name = 1; + syncObj->RefCount = 1; + syncObj->DeletePending = GL_FALSE; + syncObj->SyncCondition = condition; + syncObj->Flags = flags; + syncObj->StatusFlag = 0; + + ctx->Driver.FenceSync(ctx, syncObj, condition, flags); + + _glthread_LOCK_MUTEX(ctx->Shared->Mutex); + insert_at_tail(& ctx->Shared->SyncObjects, & syncObj->link); + _glthread_UNLOCK_MUTEX(ctx->Shared->Mutex); + + return (GLsync) syncObj; + } + + return NULL; +} + + +GLenum GLAPIENTRY +_mesa_ClientWaitSync(GLsync sync, GLbitfield flags, GLuint64 timeout) +{ + GET_CURRENT_CONTEXT(ctx); + struct gl_sync_object *const syncObj = (struct gl_sync_object *) sync; + GLenum ret; + ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, GL_WAIT_FAILED); + + if (!_mesa_validate_sync(syncObj)) { + _mesa_error(ctx, GL_INVALID_OPERATION, "glClientWaitSync"); + return GL_WAIT_FAILED; + } + + if ((flags & ~GL_SYNC_FLUSH_COMMANDS_BIT) != 0) { + _mesa_error(ctx, GL_INVALID_ENUM, "glClientWaitSync(flags=0x%x)", flags); + return GL_WAIT_FAILED; + } + + _mesa_ref_sync_object(ctx, syncObj); + + /* From the GL_ARB_sync spec: + * + * ClientWaitSync returns one of four status values. A return value of + * ALREADY_SIGNALED indicates that <sync> was signaled at the time + * ClientWaitSync was called. ALREADY_SIGNALED will always be returned + * if <sync> was signaled, even if the value of <timeout> is zero. + */ + ctx->Driver.CheckSync(ctx, syncObj); + if (syncObj->StatusFlag) { + ret = GL_ALREADY_SIGNALED; + } else { + ctx->Driver.ClientWaitSync(ctx, syncObj, flags, timeout); + + ret = syncObj->StatusFlag ? GL_CONDITION_SATISFIED : GL_TIMEOUT_EXPIRED; + } + + _mesa_unref_sync_object(ctx, syncObj); + return ret; +} + + +void GLAPIENTRY +_mesa_WaitSync(GLsync sync, GLbitfield flags, GLuint64 timeout) +{ + GET_CURRENT_CONTEXT(ctx); + struct gl_sync_object *const syncObj = (struct gl_sync_object *) sync; + ASSERT_OUTSIDE_BEGIN_END(ctx); + + if (!_mesa_validate_sync(syncObj)) { + _mesa_error(ctx, GL_INVALID_OPERATION, "glWaitSync"); + return; + } + + if (flags != 0) { + _mesa_error(ctx, GL_INVALID_ENUM, "glWaitSync(flags=0x%x)", flags); + return; + } + + /* From the GL_ARB_sync spec: + * + * If the value of <timeout> is zero, then WaitSync does nothing. + */ + if (timeout == 0) { + return; + } + + ctx->Driver.ServerWaitSync(ctx, syncObj, flags, timeout); +} + + +void GLAPIENTRY +_mesa_GetSynciv(GLsync sync, GLenum pname, GLsizei bufSize, GLsizei *length, + GLint *values) +{ + GET_CURRENT_CONTEXT(ctx); + struct gl_sync_object *const syncObj = (struct gl_sync_object *) sync; + GLsizei size = 0; + GLint v[1]; + ASSERT_OUTSIDE_BEGIN_END(ctx); + + if (!_mesa_validate_sync(syncObj)) { + _mesa_error(ctx, GL_INVALID_OPERATION, "glGetSynciv"); + return; + } + + switch (pname) { + case GL_OBJECT_TYPE: + v[0] = syncObj->Type; + size = 1; + break; + + case GL_SYNC_CONDITION: + v[0] = syncObj->SyncCondition; + size = 1; + break; + + case GL_SYNC_STATUS: + /* Update the state of the sync by dipping into the driver. Note that + * this call won't block. It just updates state in the common object + * data from the current driver state. + */ + ctx->Driver.CheckSync(ctx, syncObj); + + v[0] = (syncObj->StatusFlag) ? GL_SIGNALED : GL_UNSIGNALED; + size = 1; + break; + + case GL_SYNC_FLAGS: + v[0] = syncObj->Flags; + size = 1; + break; + + default: + _mesa_error(ctx, GL_INVALID_ENUM, "glGetSynciv(pname=0x%x)\n", pname); + return; + } + + if (size > 0) { + const GLsizei copy_count = MIN2(size, bufSize); + + _mesa_memcpy(values, v, sizeof(GLint) * copy_count); + } + + if (length != NULL) { + *length = size; + } +} + +#endif /* FEATURE_ARB_sync */ |