1 /*
2 * Copyright © 2016 Intel Corporation
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
13 * Software.
14 *
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
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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.
22 */
23
24 #include <stdbool.h>
25 #include "context.h"
26 #include "debug_output.h"
27 #include "get.h"
28 #include "mtypes.h"
29 #include "macros.h"
30 #include "main/dispatch.h" /* for _gloffset_COUNT */
31 #include "api_exec_decl.h"
32
33 static void GLAPIENTRY
_context_lost_GetSynciv(GLsync sync,GLenum pname,GLsizei bufSize,GLsizei * length,GLint * values)34 _context_lost_GetSynciv(GLsync sync, GLenum pname, GLsizei bufSize,
35 GLsizei *length, GLint *values)
36 {
37 GET_CURRENT_CONTEXT(ctx);
38 if (ctx)
39 _mesa_error(ctx, GL_CONTEXT_LOST, "GetSynciv(invalid call)");
40
41 if (pname == GL_SYNC_STATUS && bufSize >= 1)
42 *values = GL_SIGNALED;
43 }
44
45 static void GLAPIENTRY
_context_lost_GetQueryObjectuiv(GLuint id,GLenum pname,GLuint * params)46 _context_lost_GetQueryObjectuiv(GLuint id, GLenum pname, GLuint *params)
47 {
48 GET_CURRENT_CONTEXT(ctx);
49 if (ctx)
50 _mesa_error(ctx, GL_CONTEXT_LOST, "GetQueryObjectuiv(context lost)");
51
52 if (pname == GL_QUERY_RESULT_AVAILABLE)
53 *params = GL_TRUE;
54 }
55
56 static int
context_lost_nop_handler(void)57 context_lost_nop_handler(void)
58 {
59 GET_CURRENT_CONTEXT(ctx);
60 if (ctx)
61 _mesa_error(ctx, GL_CONTEXT_LOST, "context lost");
62
63 return 0;
64 }
65
66 void
_mesa_set_context_lost_dispatch(struct gl_context * ctx)67 _mesa_set_context_lost_dispatch(struct gl_context *ctx)
68 {
69 if (ctx->ContextLost == NULL) {
70 int numEntries = MAX2(_glapi_get_dispatch_table_size(), _gloffset_COUNT);
71
72 ctx->ContextLost = malloc(numEntries * sizeof(_glapi_proc));
73 if (!ctx->ContextLost)
74 return;
75
76 _glapi_proc *entry = (_glapi_proc *) ctx->ContextLost;
77 unsigned i;
78 for (i = 0; i < numEntries; i++)
79 entry[i] = (_glapi_proc) context_lost_nop_handler;
80
81 /* The ARB_robustness specification says:
82 *
83 * "* GetError and GetGraphicsResetStatus behave normally following a
84 * graphics reset, so that the application can determine a reset
85 * has occurred, and when it is safe to destroy and recreate the
86 * context.
87 *
88 * * Any commands which might cause a polling application to block
89 * indefinitely will generate a CONTEXT_LOST error, but will also
90 * return a value indicating completion to the application. Such
91 * commands include:
92 *
93 * + GetSynciv with <pname> SYNC_STATUS ignores the other
94 * parameters and returns SIGNALED in <values>.
95 *
96 * + GetQueryObjectuiv with <pname> QUERY_RESULT_AVAILABLE
97 * ignores the other parameters and returns TRUE in <params>."
98 */
99 SET_GetError(ctx->ContextLost, _mesa_GetError);
100 SET_GetGraphicsResetStatusARB(ctx->ContextLost, _mesa_GetGraphicsResetStatusARB);
101 SET_GetSynciv(ctx->ContextLost, _context_lost_GetSynciv);
102 SET_GetQueryObjectuiv(ctx->ContextLost, _context_lost_GetQueryObjectuiv);
103 }
104
105 ctx->CurrentServerDispatch = ctx->ContextLost;
106 _glapi_set_dispatch(ctx->CurrentServerDispatch);
107 }
108
109 /**
110 * Returns an error code specified by GL_ARB_robustness, or GL_NO_ERROR.
111 * \return current context status
112 */
113 GLenum GLAPIENTRY
_mesa_GetGraphicsResetStatusARB(void)114 _mesa_GetGraphicsResetStatusARB( void )
115 {
116 GET_CURRENT_CONTEXT(ctx);
117 GLenum status = GL_NO_ERROR;
118
119 /* The ARB_robustness specification says:
120 *
121 * "If the reset notification behavior is NO_RESET_NOTIFICATION_ARB,
122 * then the implementation will never deliver notification of reset
123 * events, and GetGraphicsResetStatusARB will always return NO_ERROR."
124 */
125 if (ctx->Const.ResetStrategy == GL_NO_RESET_NOTIFICATION_ARB) {
126 if (MESA_VERBOSE & VERBOSE_API)
127 _mesa_debug(ctx,
128 "glGetGraphicsResetStatusARB always returns GL_NO_ERROR "
129 "because reset notifictation was not requested at context "
130 "creation.\n");
131
132 return GL_NO_ERROR;
133 }
134
135 if (ctx->Driver.GetGraphicsResetStatus) {
136 /* Query the reset status of this context from the driver core.
137 */
138 status = ctx->Driver.GetGraphicsResetStatus(ctx);
139
140 simple_mtx_lock(&ctx->Shared->Mutex);
141
142 /* If this context has not been affected by a GPU reset, check to see if
143 * some other context in the share group has been affected by a reset.
144 * If another context saw a reset but this context did not, assume that
145 * this context was not guilty.
146 */
147 if (status != GL_NO_ERROR) {
148 ctx->Shared->ShareGroupReset = true;
149 ctx->Shared->DisjointOperation = true;
150 } else if (ctx->Shared->ShareGroupReset && !ctx->ShareGroupReset) {
151 status = GL_INNOCENT_CONTEXT_RESET_ARB;
152 }
153
154 ctx->ShareGroupReset = ctx->Shared->ShareGroupReset;
155 simple_mtx_unlock(&ctx->Shared->Mutex);
156 }
157
158 if (status != GL_NO_ERROR)
159 _mesa_set_context_lost_dispatch(ctx);
160
161 if (!ctx->Driver.GetGraphicsResetStatus && (MESA_VERBOSE & VERBOSE_API))
162 _mesa_debug(ctx,
163 "glGetGraphicsResetStatusARB always returns GL_NO_ERROR "
164 "because the driver doesn't track reset status.\n");
165
166 return status;
167 }
168