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 32static void GLAPIENTRY 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 44static void GLAPIENTRY 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 55static int 56context_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 65void 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->CurrentDispatch = ctx->ContextLost; 105 _glapi_set_dispatch(ctx->CurrentDispatch); 106} 107 108/** 109 * Returns an error code specified by GL_ARB_robustness, or GL_NO_ERROR. 110 * \return current context status 111 */ 112GLenum GLAPIENTRY 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 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 } else if (ctx->Shared->ShareGroupReset && !ctx->ShareGroupReset) { 149 status = GL_INNOCENT_CONTEXT_RESET_ARB; 150 } 151 152 ctx->ShareGroupReset = ctx->Shared->ShareGroupReset; 153 mtx_unlock(&ctx->Shared->Mutex); 154 } 155 156 if (status != GL_NO_ERROR) 157 _mesa_set_context_lost_dispatch(ctx); 158 159 if (!ctx->Driver.GetGraphicsResetStatus && (MESA_VERBOSE & VERBOSE_API)) 160 _mesa_debug(ctx, 161 "glGetGraphicsResetStatusARB always returns GL_NO_ERROR " 162 "because the driver doesn't track reset status.\n"); 163 164 return status; 165} 166