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
32 static void GLAPIENTRY
_context_lost_GetSynciv(GLsync sync,GLenum pname,GLsizei bufSize,GLsizei * length,GLint * values)33 _context_lost_GetSynciv(GLsync sync, GLenum pname, GLsizei bufSize,
34 GLsizei *length, GLint *values)
35 {
36 GET_CURRENT_CONTEXT(ctx);
37 if (ctx)
38 _mesa_error(ctx, GL_CONTEXT_LOST, "GetSynciv(invalid call)");
39
40 if (pname == GL_SYNC_STATUS && bufSize >= 1)
41 *values = GL_SIGNALED;
42 }
43
44 static void GLAPIENTRY
_context_lost_GetQueryObjectuiv(GLuint id,GLenum pname,GLuint * params)45 _context_lost_GetQueryObjectuiv(GLuint id, GLenum pname, GLuint *params)
46 {
47 GET_CURRENT_CONTEXT(ctx);
48 if (ctx)
49 _mesa_error(ctx, GL_CONTEXT_LOST, "GetQueryObjectuiv(context lost)");
50
51 if (pname == GL_QUERY_RESULT_AVAILABLE)
52 *params = GL_TRUE;
53 }
54
55 static int
context_lost_nop_handler(void)56 context_lost_nop_handler(void)
57 {
58 GET_CURRENT_CONTEXT(ctx);
59 if (ctx)
60 _mesa_error(ctx, GL_CONTEXT_LOST, "context lost");
61
62 return 0;
63 }
64
65 void
_mesa_set_context_lost_dispatch(struct gl_context * ctx)66 _mesa_set_context_lost_dispatch(struct gl_context *ctx)
67 {
68 if (ctx->ContextLost == NULL) {
69 int numEntries = MAX2(_glapi_get_dispatch_table_size(), _gloffset_COUNT);
70
71 ctx->ContextLost = malloc(numEntries * sizeof(_glapi_proc));
72 if (!ctx->ContextLost)
73 return;
74
75 _glapi_proc *entry = (_glapi_proc *) ctx->ContextLost;
76 unsigned i;
77 for (i = 0; i < numEntries; i++)
78 entry[i] = (_glapi_proc) context_lost_nop_handler;
79
80 /* The ARB_robustness specification says:
81 *
82 * "* GetError and GetGraphicsResetStatus behave normally following a
83 * graphics reset, so that the application can determine a reset
84 * has occurred, and when it is safe to destroy and recreate the
85 * context.
86 *
87 * * Any commands which might cause a polling application to block
88 * indefinitely will generate a CONTEXT_LOST error, but will also
89 * return a value indicating completion to the application. Such
90 * commands include:
91 *
92 * + GetSynciv with <pname> SYNC_STATUS ignores the other
93 * parameters and returns SIGNALED in <values>.
94 *
95 * + GetQueryObjectuiv with <pname> QUERY_RESULT_AVAILABLE
96 * ignores the other parameters and returns TRUE in <params>."
97 */
98 SET_GetError(ctx->ContextLost, _mesa_GetError);
99 SET_GetGraphicsResetStatusARB(ctx->ContextLost, _mesa_GetGraphicsResetStatusARB);
100 SET_GetSynciv(ctx->ContextLost, _context_lost_GetSynciv);
101 SET_GetQueryObjectuiv(ctx->ContextLost, _context_lost_GetQueryObjectuiv);
102 }
103
104 ctx->CurrentServerDispatch = ctx->ContextLost;
105 _glapi_set_dispatch(ctx->CurrentServerDispatch);
106 }
107
108 /**
109 * Returns an error code specified by GL_ARB_robustness, or GL_NO_ERROR.
110 * \return current context status
111 */
112 GLenum GLAPIENTRY
_mesa_GetGraphicsResetStatusARB(void)113 _mesa_GetGraphicsResetStatusARB( void )
114 {
115 GET_CURRENT_CONTEXT(ctx);
116 GLenum status = GL_NO_ERROR;
117
118 /* The ARB_robustness specification says:
119 *
120 * "If the reset notification behavior is NO_RESET_NOTIFICATION_ARB,
121 * then the implementation will never deliver notification of reset
122 * events, and GetGraphicsResetStatusARB will always return NO_ERROR."
123 */
124 if (ctx->Const.ResetStrategy == GL_NO_RESET_NOTIFICATION_ARB) {
125 if (MESA_VERBOSE & VERBOSE_API)
126 _mesa_debug(ctx,
127 "glGetGraphicsResetStatusARB always returns GL_NO_ERROR "
128 "because reset notifictation was not requested at context "
129 "creation.\n");
130
131 return GL_NO_ERROR;
132 }
133
134 if (ctx->Driver.GetGraphicsResetStatus) {
135 /* Query the reset status of this context from the driver core.
136 */
137 status = ctx->Driver.GetGraphicsResetStatus(ctx);
138
139 simple_mtx_lock(&ctx->Shared->Mutex);
140
141 /* If this context has not been affected by a GPU reset, check to see if
142 * some other context in the share group has been affected by a reset.
143 * If another context saw a reset but this context did not, assume that
144 * this context was not guilty.
145 */
146 if (status != GL_NO_ERROR) {
147 ctx->Shared->ShareGroupReset = true;
148 ctx->Shared->DisjointOperation = true;
149 } else if (ctx->Shared->ShareGroupReset && !ctx->ShareGroupReset) {
150 status = GL_INNOCENT_CONTEXT_RESET_ARB;
151 }
152
153 ctx->ShareGroupReset = ctx->Shared->ShareGroupReset;
154 simple_mtx_unlock(&ctx->Shared->Mutex);
155 }
156
157 if (status != GL_NO_ERROR)
158 _mesa_set_context_lost_dispatch(ctx);
159
160 if (!ctx->Driver.GetGraphicsResetStatus && (MESA_VERBOSE & VERBOSE_API))
161 _mesa_debug(ctx,
162 "glGetGraphicsResetStatusARB always returns GL_NO_ERROR "
163 "because the driver doesn't track reset status.\n");
164
165 return status;
166 }
167