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