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4358 | Serge | 1 | /* |
2 | * Copyright © 2009 Intel Corporation |
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3 | * |
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4 | * Permission is hereby granted, free of charge, to any person obtaining a |
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5 | * copy of this software and associated documentation files (the "Software"), |
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6 | * to deal in the Software without restriction, including without limitation |
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7 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
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8 | * and/or sell copies of the Software, and to permit persons to whom the |
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9 | * Software is furnished to do so, subject to the following conditions: |
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10 | * |
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11 | * The above copyright notice and this permission notice (including the next |
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12 | * paragraph) shall be included in all copies or substantial portions of the |
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13 | * Software. |
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14 | * |
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15 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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16 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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17 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
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18 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
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19 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING |
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20 | * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER |
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21 | * DEALINGS IN THE SOFTWARE. |
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22 | */ |
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23 | |||
24 | /** |
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25 | * \file syncobj.c |
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26 | * Sync object management. |
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27 | * |
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28 | * Unlike textures and other objects that are shared between contexts, sync |
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29 | * objects are not bound to the context. As a result, the reference counting |
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30 | * and delete behavior of sync objects is slightly different. References to |
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31 | * sync objects are added: |
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32 | * |
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33 | * - By \c glFencSynce. This sets the initial reference count to 1. |
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34 | * - At the start of \c glClientWaitSync. The reference is held for the |
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35 | * duration of the wait call. |
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36 | * |
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37 | * References are removed: |
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38 | * |
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39 | * - By \c glDeleteSync. |
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40 | * - At the end of \c glClientWaitSync. |
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41 | * |
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42 | * Additionally, drivers may call \c _mesa_ref_sync_object and |
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43 | * \c _mesa_unref_sync_object as needed to implement \c ServerWaitSync. |
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44 | * |
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45 | * As with shader objects, sync object names become invalid as soon as |
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46 | * \c glDeleteSync is called. For this reason \c glDeleteSync sets the |
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47 | * \c DeletePending flag. All functions validate object handles by testing |
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48 | * this flag. |
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49 | * |
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50 | * \note |
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51 | * Only \c GL_ARB_sync objects are shared between contexts. If support is ever |
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52 | * added for either \c GL_NV_fence or \c GL_APPLE_fence different semantics |
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53 | * will need to be implemented. |
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54 | * |
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55 | * \author Ian Romanick |
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56 | */ |
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57 | |||
58 | #include |
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59 | #include "glheader.h" |
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60 | #include "imports.h" |
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61 | #include "context.h" |
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62 | #include "macros.h" |
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63 | #include "get.h" |
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64 | #include "dispatch.h" |
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65 | #include "mtypes.h" |
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66 | #include "set.h" |
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67 | #include "hash_table.h" |
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68 | |||
69 | #include "syncobj.h" |
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70 | |||
71 | static struct gl_sync_object * |
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72 | _mesa_new_sync_object(struct gl_context *ctx, GLenum type) |
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73 | { |
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74 | struct gl_sync_object *s = MALLOC_STRUCT(gl_sync_object); |
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75 | (void) ctx; |
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76 | (void) type; |
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77 | |||
78 | return s; |
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79 | } |
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80 | |||
81 | |||
82 | static void |
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83 | _mesa_delete_sync_object(struct gl_context *ctx, struct gl_sync_object *syncObj) |
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84 | { |
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85 | (void) ctx; |
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86 | free(syncObj); |
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87 | } |
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88 | |||
89 | |||
90 | static void |
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91 | _mesa_fence_sync(struct gl_context *ctx, struct gl_sync_object *syncObj, |
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92 | GLenum condition, GLbitfield flags) |
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93 | { |
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94 | (void) ctx; |
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95 | (void) condition; |
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96 | (void) flags; |
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97 | |||
98 | syncObj->StatusFlag = 1; |
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99 | } |
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100 | |||
101 | |||
102 | static void |
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103 | _mesa_check_sync(struct gl_context *ctx, struct gl_sync_object *syncObj) |
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104 | { |
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105 | (void) ctx; |
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106 | (void) syncObj; |
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107 | |||
108 | /* No-op for software rendering. Hardware drivers will need to determine |
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109 | * whether the state of the sync object has changed. |
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110 | */ |
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111 | } |
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112 | |||
113 | |||
114 | static void |
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115 | _mesa_wait_sync(struct gl_context *ctx, struct gl_sync_object *syncObj, |
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116 | GLbitfield flags, GLuint64 timeout) |
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117 | { |
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118 | (void) ctx; |
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119 | (void) syncObj; |
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120 | (void) flags; |
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121 | (void) timeout; |
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122 | |||
123 | /* No-op for software rendering. Hardware drivers will need to wait until |
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124 | * the state of the sync object changes or the timeout expires. |
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125 | */ |
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126 | } |
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127 | |||
128 | |||
129 | void |
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130 | _mesa_init_sync_object_functions(struct dd_function_table *driver) |
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131 | { |
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132 | driver->NewSyncObject = _mesa_new_sync_object; |
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133 | driver->FenceSync = _mesa_fence_sync; |
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134 | driver->DeleteSyncObject = _mesa_delete_sync_object; |
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135 | driver->CheckSync = _mesa_check_sync; |
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136 | |||
137 | /* Use the same no-op wait function for both. |
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138 | */ |
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139 | driver->ClientWaitSync = _mesa_wait_sync; |
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140 | driver->ServerWaitSync = _mesa_wait_sync; |
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141 | } |
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142 | |||
143 | /** |
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144 | * Allocate/init the context state related to sync objects. |
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145 | */ |
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146 | void |
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147 | _mesa_init_sync(struct gl_context *ctx) |
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148 | { |
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149 | (void) ctx; |
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150 | } |
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151 | |||
152 | |||
153 | /** |
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154 | * Free the context state related to sync objects. |
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155 | */ |
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156 | void |
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157 | _mesa_free_sync_data(struct gl_context *ctx) |
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158 | { |
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159 | (void) ctx; |
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160 | } |
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161 | |||
162 | |||
163 | static int |
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164 | _mesa_validate_sync(struct gl_context *ctx, struct gl_sync_object *syncObj) |
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165 | { |
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166 | return (syncObj != NULL) |
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167 | && _mesa_set_search(ctx->Shared->SyncObjects, |
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168 | _mesa_hash_pointer(syncObj), |
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169 | syncObj) != NULL |
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170 | && (syncObj->Type == GL_SYNC_FENCE) |
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171 | && !syncObj->DeletePending; |
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172 | } |
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173 | |||
174 | |||
175 | void |
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176 | _mesa_ref_sync_object(struct gl_context *ctx, struct gl_sync_object *syncObj) |
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177 | { |
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178 | _glthread_LOCK_MUTEX(ctx->Shared->Mutex); |
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179 | syncObj->RefCount++; |
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180 | _glthread_UNLOCK_MUTEX(ctx->Shared->Mutex); |
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181 | } |
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182 | |||
183 | |||
184 | void |
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185 | _mesa_unref_sync_object(struct gl_context *ctx, struct gl_sync_object *syncObj) |
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186 | { |
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187 | struct set_entry *entry; |
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188 | |||
189 | _glthread_LOCK_MUTEX(ctx->Shared->Mutex); |
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190 | syncObj->RefCount--; |
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191 | if (syncObj->RefCount == 0) { |
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192 | entry = _mesa_set_search(ctx->Shared->SyncObjects, |
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193 | _mesa_hash_pointer(syncObj), |
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194 | syncObj); |
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195 | assert (entry != NULL); |
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196 | _mesa_set_remove(ctx->Shared->SyncObjects, entry); |
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197 | _glthread_UNLOCK_MUTEX(ctx->Shared->Mutex); |
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198 | |||
199 | ctx->Driver.DeleteSyncObject(ctx, syncObj); |
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200 | } else { |
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201 | _glthread_UNLOCK_MUTEX(ctx->Shared->Mutex); |
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202 | } |
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203 | } |
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204 | |||
205 | |||
206 | GLboolean GLAPIENTRY |
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207 | _mesa_IsSync(GLsync sync) |
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208 | { |
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209 | GET_CURRENT_CONTEXT(ctx); |
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210 | struct gl_sync_object *const syncObj = (struct gl_sync_object *) sync; |
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211 | ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, GL_FALSE); |
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212 | |||
213 | return _mesa_validate_sync(ctx, syncObj) ? GL_TRUE : GL_FALSE; |
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214 | } |
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215 | |||
216 | |||
217 | void GLAPIENTRY |
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218 | _mesa_DeleteSync(GLsync sync) |
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219 | { |
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220 | GET_CURRENT_CONTEXT(ctx); |
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221 | struct gl_sync_object *const syncObj = (struct gl_sync_object *) sync; |
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222 | |||
223 | /* From the GL_ARB_sync spec: |
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224 | * |
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225 | * DeleteSync will silently ignore a |
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226 | * INVALID_VALUE error is generated if |
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227 | * name of a sync object. |
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228 | */ |
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229 | if (sync == 0) { |
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230 | return; |
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231 | } |
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232 | |||
233 | if (!_mesa_validate_sync(ctx, syncObj)) { |
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234 | _mesa_error(ctx, GL_INVALID_VALUE, "glDeleteSync (not a valid sync object)"); |
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235 | return; |
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236 | } |
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237 | |||
238 | /* If there are no client-waits or server-waits pending on this sync, delete |
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239 | * the underlying object. |
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240 | */ |
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241 | syncObj->DeletePending = GL_TRUE; |
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242 | _mesa_unref_sync_object(ctx, syncObj); |
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243 | } |
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244 | |||
245 | |||
246 | GLsync GLAPIENTRY |
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247 | _mesa_FenceSync(GLenum condition, GLbitfield flags) |
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248 | { |
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249 | GET_CURRENT_CONTEXT(ctx); |
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250 | struct gl_sync_object *syncObj; |
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251 | ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, 0); |
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252 | |||
253 | if (condition != GL_SYNC_GPU_COMMANDS_COMPLETE) { |
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254 | _mesa_error(ctx, GL_INVALID_ENUM, "glFenceSync(condition=0x%x)", |
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255 | condition); |
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256 | return 0; |
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257 | } |
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258 | |||
259 | if (flags != 0) { |
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260 | _mesa_error(ctx, GL_INVALID_VALUE, "glFenceSync(flags=0x%x)", |
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261 | condition); |
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262 | return 0; |
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263 | } |
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264 | |||
265 | syncObj = ctx->Driver.NewSyncObject(ctx, GL_SYNC_FENCE); |
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266 | if (syncObj != NULL) { |
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267 | syncObj->Type = GL_SYNC_FENCE; |
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268 | /* The name is not currently used, and it is never visible to |
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269 | * applications. If sync support is extended to provide support for |
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270 | * NV_fence, this field will be used. We'll also need to add an object |
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271 | * ID hashtable. |
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272 | */ |
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273 | syncObj->Name = 1; |
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274 | syncObj->RefCount = 1; |
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275 | syncObj->DeletePending = GL_FALSE; |
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276 | syncObj->SyncCondition = condition; |
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277 | syncObj->Flags = flags; |
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278 | syncObj->StatusFlag = 0; |
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279 | |||
280 | ctx->Driver.FenceSync(ctx, syncObj, condition, flags); |
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281 | |||
282 | _glthread_LOCK_MUTEX(ctx->Shared->Mutex); |
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283 | _mesa_set_add(ctx->Shared->SyncObjects, |
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284 | _mesa_hash_pointer(syncObj), |
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285 | syncObj); |
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286 | _glthread_UNLOCK_MUTEX(ctx->Shared->Mutex); |
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287 | |||
288 | return (GLsync) syncObj; |
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289 | } |
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290 | |||
291 | return NULL; |
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292 | } |
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293 | |||
294 | |||
295 | GLenum GLAPIENTRY |
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296 | _mesa_ClientWaitSync(GLsync sync, GLbitfield flags, GLuint64 timeout) |
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297 | { |
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298 | GET_CURRENT_CONTEXT(ctx); |
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299 | struct gl_sync_object *const syncObj = (struct gl_sync_object *) sync; |
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300 | GLenum ret; |
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301 | ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, GL_WAIT_FAILED); |
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302 | |||
303 | if (!_mesa_validate_sync(ctx, syncObj)) { |
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304 | _mesa_error(ctx, GL_INVALID_VALUE, "glClientWaitSync (not a valid sync object)"); |
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305 | return GL_WAIT_FAILED; |
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306 | } |
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307 | |||
308 | if ((flags & ~GL_SYNC_FLUSH_COMMANDS_BIT) != 0) { |
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309 | _mesa_error(ctx, GL_INVALID_VALUE, "glClientWaitSync(flags=0x%x)", flags); |
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310 | return GL_WAIT_FAILED; |
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311 | } |
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312 | |||
313 | _mesa_ref_sync_object(ctx, syncObj); |
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314 | |||
315 | /* From the GL_ARB_sync spec: |
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316 | * |
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317 | * ClientWaitSync returns one of four status values. A return value of |
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318 | * ALREADY_SIGNALED indicates that |
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319 | * ClientWaitSync was called. ALREADY_SIGNALED will always be returned |
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320 | * if |
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321 | */ |
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322 | ctx->Driver.CheckSync(ctx, syncObj); |
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323 | if (syncObj->StatusFlag) { |
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324 | ret = GL_ALREADY_SIGNALED; |
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325 | } else { |
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326 | if (timeout == 0) { |
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327 | ret = GL_TIMEOUT_EXPIRED; |
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328 | } else { |
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329 | ctx->Driver.ClientWaitSync(ctx, syncObj, flags, timeout); |
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330 | |||
331 | ret = syncObj->StatusFlag ? GL_CONDITION_SATISFIED : GL_TIMEOUT_EXPIRED; |
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332 | } |
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333 | } |
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334 | |||
335 | _mesa_unref_sync_object(ctx, syncObj); |
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336 | return ret; |
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337 | } |
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338 | |||
339 | |||
340 | void GLAPIENTRY |
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341 | _mesa_WaitSync(GLsync sync, GLbitfield flags, GLuint64 timeout) |
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342 | { |
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343 | GET_CURRENT_CONTEXT(ctx); |
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344 | struct gl_sync_object *const syncObj = (struct gl_sync_object *) sync; |
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345 | |||
346 | if (!_mesa_validate_sync(ctx, syncObj)) { |
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347 | _mesa_error(ctx, GL_INVALID_VALUE, "glWaitSync (not a valid sync object)"); |
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348 | return; |
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349 | } |
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350 | |||
351 | if (flags != 0) { |
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352 | _mesa_error(ctx, GL_INVALID_VALUE, "glWaitSync(flags=0x%x)", flags); |
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353 | return; |
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354 | } |
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355 | |||
356 | if (timeout != GL_TIMEOUT_IGNORED) { |
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357 | _mesa_error(ctx, GL_INVALID_VALUE, "glWaitSync(timeout=0x%" PRIx64 ")", |
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358 | (uint64_t) timeout); |
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359 | return; |
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360 | } |
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361 | |||
362 | ctx->Driver.ServerWaitSync(ctx, syncObj, flags, timeout); |
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363 | } |
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364 | |||
365 | |||
366 | void GLAPIENTRY |
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367 | _mesa_GetSynciv(GLsync sync, GLenum pname, GLsizei bufSize, GLsizei *length, |
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368 | GLint *values) |
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369 | { |
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370 | GET_CURRENT_CONTEXT(ctx); |
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371 | struct gl_sync_object *const syncObj = (struct gl_sync_object *) sync; |
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372 | GLsizei size = 0; |
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373 | GLint v[1]; |
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374 | |||
375 | if (!_mesa_validate_sync(ctx, syncObj)) { |
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376 | _mesa_error(ctx, GL_INVALID_VALUE, "glGetSynciv (not a valid sync object)"); |
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377 | return; |
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378 | } |
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379 | |||
380 | switch (pname) { |
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381 | case GL_OBJECT_TYPE: |
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382 | v[0] = syncObj->Type; |
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383 | size = 1; |
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384 | break; |
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385 | |||
386 | case GL_SYNC_CONDITION: |
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387 | v[0] = syncObj->SyncCondition; |
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388 | size = 1; |
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389 | break; |
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390 | |||
391 | case GL_SYNC_STATUS: |
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392 | /* Update the state of the sync by dipping into the driver. Note that |
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393 | * this call won't block. It just updates state in the common object |
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394 | * data from the current driver state. |
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395 | */ |
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396 | ctx->Driver.CheckSync(ctx, syncObj); |
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397 | |||
398 | v[0] = (syncObj->StatusFlag) ? GL_SIGNALED : GL_UNSIGNALED; |
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399 | size = 1; |
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400 | break; |
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401 | |||
402 | case GL_SYNC_FLAGS: |
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403 | v[0] = syncObj->Flags; |
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404 | size = 1; |
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405 | break; |
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406 | |||
407 | default: |
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408 | _mesa_error(ctx, GL_INVALID_ENUM, "glGetSynciv(pname=0x%x)\n", pname); |
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409 | return; |
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410 | } |
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411 | |||
412 | if (size > 0 && bufSize > 0) { |
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413 | const GLsizei copy_count = MIN2(size, bufSize); |
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414 | |||
415 | memcpy(values, v, sizeof(GLint) * copy_count); |
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416 | } |
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417 | |||
418 | if (length != NULL) { |
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419 | *length = size; |
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420 | } |
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421 | } |