2 * Copyright © 2009 Intel Corporation
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5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
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9 * Software is furnished to do so, subject to the following conditions:
11 * The above copyright notice and this permission notice (including the next
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15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
21 * DEALINGS IN THE SOFTWARE.
26 * Sync object management.
28 * Unlike textures and other objects that are shared between contexts, sync
29 * objects are not bound to the context. As a result, the reference counting
30 * and delete behavior of sync objects is slightly different. References to
31 * sync objects are added:
33 * - By \c glFencSynce. This sets the initial reference count to 1.
34 * - At the start of \c glClientWaitSync. The reference is held for the
35 * duration of the wait call.
37 * References are removed:
39 * - By \c glDeleteSync.
40 * - At the end of \c glClientWaitSync.
42 * Additionally, drivers may call \c _mesa_ref_sync_object and
43 * \c _mesa_unref_sync_object as needed to implement \c ServerWaitSync.
45 * As with shader objects, sync object names become invalid as soon as
46 * \c glDeleteSync is called. For this reason \c glDeleteSync sets the
47 * \c DeletePending flag. All functions validate object handles by testing
51 * Only \c GL_ARB_sync objects are shared between contexts. If support is ever
52 * added for either \c GL_NV_fence or \c GL_APPLE_fence different semantics
53 * will need to be implemented.
55 * \author Ian Romanick <ian.d.romanick@intel.com>
67 #include "hash_table.h"
71 static struct gl_sync_object
*
72 _mesa_new_sync_object(struct gl_context
*ctx
, GLenum type
)
74 struct gl_sync_object
*s
= CALLOC_STRUCT(gl_sync_object
);
83 _mesa_delete_sync_object(struct gl_context
*ctx
, struct gl_sync_object
*syncObj
)
92 _mesa_fence_sync(struct gl_context
*ctx
, struct gl_sync_object
*syncObj
,
93 GLenum condition
, GLbitfield flags
)
99 syncObj
->StatusFlag
= 1;
104 _mesa_check_sync(struct gl_context
*ctx
, struct gl_sync_object
*syncObj
)
109 /* No-op for software rendering. Hardware drivers will need to determine
110 * whether the state of the sync object has changed.
116 _mesa_wait_sync(struct gl_context
*ctx
, struct gl_sync_object
*syncObj
,
117 GLbitfield flags
, GLuint64 timeout
)
124 /* No-op for software rendering. Hardware drivers will need to wait until
125 * the state of the sync object changes or the timeout expires.
131 _mesa_init_sync_object_functions(struct dd_function_table
*driver
)
133 driver
->NewSyncObject
= _mesa_new_sync_object
;
134 driver
->FenceSync
= _mesa_fence_sync
;
135 driver
->DeleteSyncObject
= _mesa_delete_sync_object
;
136 driver
->CheckSync
= _mesa_check_sync
;
138 /* Use the same no-op wait function for both.
140 driver
->ClientWaitSync
= _mesa_wait_sync
;
141 driver
->ServerWaitSync
= _mesa_wait_sync
;
145 * Allocate/init the context state related to sync objects.
148 _mesa_init_sync(struct gl_context
*ctx
)
155 * Free the context state related to sync objects.
158 _mesa_free_sync_data(struct gl_context
*ctx
)
165 * Check if the given sync object is:
167 * - not in sync objects hash table
168 * - type is GL_SYNC_FENCE
169 * - not marked as deleted
172 _mesa_validate_sync(struct gl_context
*ctx
,
173 const struct gl_sync_object
*syncObj
)
175 return (syncObj
!= NULL
)
176 && _mesa_set_search(ctx
->Shared
->SyncObjects
,
177 _mesa_hash_pointer(syncObj
),
179 && (syncObj
->Type
== GL_SYNC_FENCE
)
180 && !syncObj
->DeletePending
;
185 _mesa_ref_sync_object(struct gl_context
*ctx
, struct gl_sync_object
*syncObj
)
187 mtx_lock(&ctx
->Shared
->Mutex
);
189 mtx_unlock(&ctx
->Shared
->Mutex
);
194 _mesa_unref_sync_object(struct gl_context
*ctx
, struct gl_sync_object
*syncObj
)
196 struct set_entry
*entry
;
198 mtx_lock(&ctx
->Shared
->Mutex
);
200 if (syncObj
->RefCount
== 0) {
201 entry
= _mesa_set_search(ctx
->Shared
->SyncObjects
,
202 _mesa_hash_pointer(syncObj
),
204 assert (entry
!= NULL
);
205 _mesa_set_remove(ctx
->Shared
->SyncObjects
, entry
);
206 mtx_unlock(&ctx
->Shared
->Mutex
);
208 ctx
->Driver
.DeleteSyncObject(ctx
, syncObj
);
210 mtx_unlock(&ctx
->Shared
->Mutex
);
216 _mesa_IsSync(GLsync sync
)
218 GET_CURRENT_CONTEXT(ctx
);
219 struct gl_sync_object
*const syncObj
= (struct gl_sync_object
*) sync
;
220 ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx
, GL_FALSE
);
222 return _mesa_validate_sync(ctx
, syncObj
) ? GL_TRUE
: GL_FALSE
;
227 _mesa_DeleteSync(GLsync sync
)
229 GET_CURRENT_CONTEXT(ctx
);
230 struct gl_sync_object
*const syncObj
= (struct gl_sync_object
*) sync
;
232 /* From the GL_ARB_sync spec:
234 * DeleteSync will silently ignore a <sync> value of zero. An
235 * INVALID_VALUE error is generated if <sync> is neither zero nor the
236 * name of a sync object.
242 if (!_mesa_validate_sync(ctx
, syncObj
)) {
243 _mesa_error(ctx
, GL_INVALID_VALUE
, "glDeleteSync (not a valid sync object)");
247 /* If there are no client-waits or server-waits pending on this sync, delete
248 * the underlying object.
250 syncObj
->DeletePending
= GL_TRUE
;
251 _mesa_unref_sync_object(ctx
, syncObj
);
256 _mesa_FenceSync(GLenum condition
, GLbitfield flags
)
258 GET_CURRENT_CONTEXT(ctx
);
259 struct gl_sync_object
*syncObj
;
260 ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx
, 0);
262 if (condition
!= GL_SYNC_GPU_COMMANDS_COMPLETE
) {
263 _mesa_error(ctx
, GL_INVALID_ENUM
, "glFenceSync(condition=0x%x)",
269 _mesa_error(ctx
, GL_INVALID_VALUE
, "glFenceSync(flags=0x%x)",
274 syncObj
= ctx
->Driver
.NewSyncObject(ctx
, GL_SYNC_FENCE
);
275 if (syncObj
!= NULL
) {
276 syncObj
->Type
= GL_SYNC_FENCE
;
277 /* The name is not currently used, and it is never visible to
278 * applications. If sync support is extended to provide support for
279 * NV_fence, this field will be used. We'll also need to add an object
283 syncObj
->RefCount
= 1;
284 syncObj
->DeletePending
= GL_FALSE
;
285 syncObj
->SyncCondition
= condition
;
286 syncObj
->Flags
= flags
;
287 syncObj
->StatusFlag
= 0;
289 ctx
->Driver
.FenceSync(ctx
, syncObj
, condition
, flags
);
291 mtx_lock(&ctx
->Shared
->Mutex
);
292 _mesa_set_add(ctx
->Shared
->SyncObjects
,
293 _mesa_hash_pointer(syncObj
),
295 mtx_unlock(&ctx
->Shared
->Mutex
);
297 return (GLsync
) syncObj
;
305 _mesa_ClientWaitSync(GLsync sync
, GLbitfield flags
, GLuint64 timeout
)
307 GET_CURRENT_CONTEXT(ctx
);
308 struct gl_sync_object
*const syncObj
= (struct gl_sync_object
*) sync
;
310 ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx
, GL_WAIT_FAILED
);
312 if (!_mesa_validate_sync(ctx
, syncObj
)) {
313 _mesa_error(ctx
, GL_INVALID_VALUE
, "glClientWaitSync (not a valid sync object)");
314 return GL_WAIT_FAILED
;
317 if ((flags
& ~GL_SYNC_FLUSH_COMMANDS_BIT
) != 0) {
318 _mesa_error(ctx
, GL_INVALID_VALUE
, "glClientWaitSync(flags=0x%x)", flags
);
319 return GL_WAIT_FAILED
;
322 _mesa_ref_sync_object(ctx
, syncObj
);
324 /* From the GL_ARB_sync spec:
326 * ClientWaitSync returns one of four status values. A return value of
327 * ALREADY_SIGNALED indicates that <sync> was signaled at the time
328 * ClientWaitSync was called. ALREADY_SIGNALED will always be returned
329 * if <sync> was signaled, even if the value of <timeout> is zero.
331 ctx
->Driver
.CheckSync(ctx
, syncObj
);
332 if (syncObj
->StatusFlag
) {
333 ret
= GL_ALREADY_SIGNALED
;
336 ret
= GL_TIMEOUT_EXPIRED
;
338 ctx
->Driver
.ClientWaitSync(ctx
, syncObj
, flags
, timeout
);
340 ret
= syncObj
->StatusFlag
? GL_CONDITION_SATISFIED
: GL_TIMEOUT_EXPIRED
;
344 _mesa_unref_sync_object(ctx
, syncObj
);
350 _mesa_WaitSync(GLsync sync
, GLbitfield flags
, GLuint64 timeout
)
352 GET_CURRENT_CONTEXT(ctx
);
353 struct gl_sync_object
*const syncObj
= (struct gl_sync_object
*) sync
;
355 if (!_mesa_validate_sync(ctx
, syncObj
)) {
356 _mesa_error(ctx
, GL_INVALID_VALUE
, "glWaitSync (not a valid sync object)");
361 _mesa_error(ctx
, GL_INVALID_VALUE
, "glWaitSync(flags=0x%x)", flags
);
365 if (timeout
!= GL_TIMEOUT_IGNORED
) {
366 _mesa_error(ctx
, GL_INVALID_VALUE
, "glWaitSync(timeout=0x%" PRIx64
")",
371 ctx
->Driver
.ServerWaitSync(ctx
, syncObj
, flags
, timeout
);
376 _mesa_GetSynciv(GLsync sync
, GLenum pname
, GLsizei bufSize
, GLsizei
*length
,
379 GET_CURRENT_CONTEXT(ctx
);
380 struct gl_sync_object
*const syncObj
= (struct gl_sync_object
*) sync
;
384 if (!_mesa_validate_sync(ctx
, syncObj
)) {
385 _mesa_error(ctx
, GL_INVALID_VALUE
, "glGetSynciv (not a valid sync object)");
391 v
[0] = syncObj
->Type
;
395 case GL_SYNC_CONDITION
:
396 v
[0] = syncObj
->SyncCondition
;
401 /* Update the state of the sync by dipping into the driver. Note that
402 * this call won't block. It just updates state in the common object
403 * data from the current driver state.
405 ctx
->Driver
.CheckSync(ctx
, syncObj
);
407 v
[0] = (syncObj
->StatusFlag
) ? GL_SIGNALED
: GL_UNSIGNALED
;
412 v
[0] = syncObj
->Flags
;
417 _mesa_error(ctx
, GL_INVALID_ENUM
, "glGetSynciv(pname=0x%x)\n", pname
);
421 if (size
> 0 && bufSize
> 0) {
422 const GLsizei copy_count
= MIN2(size
, bufSize
);
424 memcpy(values
, v
, sizeof(GLint
) * copy_count
);
427 if (length
!= NULL
) {