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1 // Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies). |
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2 // All rights reserved. |
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3 // This component and the accompanying materials are made available |
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4 // under the terms of "Eclipse Public License v1.0" |
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5 // which accompanies this distribution, and is available |
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6 // at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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7 // |
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8 // Initial Contributors: |
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9 // Nokia Corporation - initial contribution. |
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10 // |
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11 // Contributors: |
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12 // |
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13 // Description: |
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14 // eglsynchelper.c |
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15 // |
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16 |
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17 #include "eglsynchelper.h" |
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18 #include "EGL/egltypes.h" |
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19 |
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20 #ifndef EGL_EGLEXT_PROTOTYPES |
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21 |
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22 #define EGLSYNC_TYPE 0xE5 |
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23 |
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24 /* sync object data type for POSIX thread implementation*/ |
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25 |
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26 typedef struct CondVarSync_* NativeSyncType; |
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27 |
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28 #ifdef __cplusplus |
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29 extern "C" { |
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30 #endif |
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31 |
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32 /*-------------------------------------------------------------------*//*! |
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33 * \brief Create a sync object for the specified display. |
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34 * \ingroup api |
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35 * \param dpy Identifier of the display which will own the sync object |
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36 * \param type Type of the sync object. EGL_SYNC_REUSABLE_KHR is only supported |
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37 * \param attrib_list Attribute-value list specifying attributes of the sync |
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38 * object, terminated by an attribute entry EGL_NONE |
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39 * \return Handle for the created sync object if successful, EGL_NO_SYNC_KHR otherwise |
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40 * \error EGL_BAD_DISPLAY if <dpy> is not a name of a valid EGLDisplay; |
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41 * EGL_NOT_INITIALIZED if the display object associated with the <dpy> has not been initialized; |
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42 * EGL_BAD_ATTRIBUTE if <attrib_list> is neither NULL nor empty (containing only EGL_NONE) or |
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43 * if <type> is not a supported type of sync object; |
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44 * EGL_BAD_ALLOC if the memory allocation related to sync object is not successful |
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45 * \note If <type> is EGL_SYNC_REUSABLE_KHR, a reusable sync object is created. |
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46 * In this case <attrib_list> must be NULL or empty (containing only EGL_NONE). |
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47 * *//*-------------------------------------------------------------------*/ |
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48 EGLSyncKHR eglCreateSyncKHR( EGLDisplay dpy, |
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49 EGLenum condition, |
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50 const EGLint *attrib_list ) |
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51 { |
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52 PFNEGLCREATESYNCKHRPROC createPointer = (PFNEGLCREATESYNCKHRPROC) eglGetProcAddress("eglCreateSyncKHR"); |
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53 |
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54 if (createPointer == NULL) |
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55 { |
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56 return EGL_NO_SYNC_KHR; |
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57 } |
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58 else |
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59 { |
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60 return createPointer(dpy, condition, attrib_list); |
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61 } |
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62 } |
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63 |
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64 |
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65 /*-------------------------------------------------------------------*//*! |
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66 * \brief Destroy a sync object and free memory associated with it |
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67 * \ingroup api |
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68 * \param dpy Identifier of the display which owns the sync object |
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69 * \param sync Sync object handle. |
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70 * \return EGL_TRUE if deletion was successful and EGL_FALSE otherwise |
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71 * \error EGL_BAD_DISPLAY if <dpy> is not a name of a valid EGLDisplay; |
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72 * EGL_NOT_INITIALIZED if the display object associated with the <dpy> has not been initialized; |
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73 * EGL_BAD_PARAMETER if <sync> is not a valid sync object for <dpy> |
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74 * \note If any eglClientWaitSyncKHR commands are blocking on <sync> when |
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75 * eglDestroySyncKHR is called, they will be woken up, as if <sync> were signaled. |
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76 * If no errors are generated, <sync> will no longer be the handle of a valid sync object. |
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77 *//*-------------------------------------------------------------------*/ |
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78 EGLBoolean eglDestroySyncKHR( EGLDisplay dpy, EGLSyncKHR sync ) |
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79 { |
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80 PFNEGLDESTROYSYNCKHRPROC destroyPointer = (PFNEGLDESTROYSYNCKHRPROC) eglGetProcAddress("eglDestroySyncKHR"); |
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81 |
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82 if (destroyPointer == NULL) |
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83 { |
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84 return EGL_FALSE; |
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85 } |
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86 else |
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87 { |
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88 return destroyPointer(dpy, sync); |
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89 } |
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90 } |
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91 |
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92 /*-------------------------------------------------------------------*//*! |
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93 * \brief Blocks the calling thread until the specified sync object |
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94 * is signaled, or until <timeout> nanoseconds have passed. |
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95 * \ingroup api |
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96 * \param dpy Identifier of the display which owns the sync object. |
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97 * \param sync Sync object handle. |
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98 * \param flags If the EGL_FLUSH_COMMANDS_BIT_KHR bit is set in <flags> |
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99 * and <sync> is unsignaled when the function is called, then the equivalent |
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100 * of Flush() will be performed for the current API context. |
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101 * \param timeout The thread will be unblocked when <timeout> is expired. |
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102 * If the <timeout> is to zero, the function just test the current status |
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103 * of the sync object. If the <timeout> is set to EGL_FOREVER_KHR, then the |
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104 * function does not time out. For all other values, <timeout> is adjusted to |
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105 * the closest value which may be substantially longer than one nanosecond. |
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106 * \return EGL_CONDITION_SATISFIED if <sync> was signaled before |
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107 * the timeout expired, which includes the case when <sync> was already |
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108 * signaled when eglClientWaitSyncKHR was called; EGL_TIMEOUT_EXPIRED_KHR if the |
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109 * specified timeout period expired before <sync> was signaled; |
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110 * EGL_FALSE if an error occurs. |
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111 * \error EGL_BAD_DISPLAY if <dpy> is not a name of a valid EGLDisplay; |
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112 * EGL_NOT_INITIALIZED if the display object associated with the <dpy> has not been initialized; |
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113 * EGL_BAD_PARAMETER if <sync> is not a valid sync object for <dpy> or |
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114 * if <flags> does not equal to 0 or EGL_SYNC_FLUSH_COMMAND_BIT_KHR |
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115 * Note\ More than one eglClientWaitSyncKHR may be outstanding on the same <sync> at any given time. |
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116 * When there are multiple threads blocked on the same <sync> and the sync object is signaled, |
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117 * all such threads are released, but the order in which they are released is not defined. |
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118 * If a sync object is destroyed while an eglClientWaitSyncKHR is blocking on that object, |
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119 * eglClientWaitSyncKHR will unblock and return immediately, just as if the sync object |
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120 * had been signaled prior to being destroyed. |
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121 *//*-------------------------------------------------------------------*/ |
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122 EGLint eglClientWaitSyncKHR( EGLDisplay dpy, |
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123 EGLSyncKHR sync, |
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124 EGLint flags, |
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125 EGLTimeKHR timeout ) |
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126 { |
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127 PFNEGLCLIENTWAITSYNCKHRPROC clientWaitPointer = (PFNEGLCLIENTWAITSYNCKHRPROC) eglGetProcAddress("eglClientWaitSyncKHR"); |
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128 |
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129 if (clientWaitPointer == NULL) |
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130 { |
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131 return EGL_FALSE; |
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132 } |
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133 else |
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134 { |
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135 return clientWaitPointer(dpy, sync, flags, timeout); |
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136 } |
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137 } |
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138 |
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139 /*-------------------------------------------------------------------*//*! |
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140 * \brief Signals or unsignals the reusable sync object. |
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141 * \ingroup api |
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142 * \param dpy Identifier of the display which owns the sync object. |
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143 * \param sync Sync object handle. |
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144 * \param mode Status of the sync object. There are two possible states: |
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145 * EGL_SIGNALED_KHR and EGL_UNSIGNALED_KHR. |
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146 * \return EGL_TRUE if an operation was successful and EGL_FALSE otherwise. |
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147 * \note The error code returned from eglSignalSyncImpl() will be generated |
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148 *//*-------------------------------------------------------------------*/ |
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149 EGLBoolean eglSignalSyncKHR( EGLDisplay dpy, |
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150 EGLSyncKHR sync, |
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151 EGLenum mode ) |
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152 { |
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153 PFNEGLSIGNALSYNCKHRPROC signalPointer = (PFNEGLSIGNALSYNCKHRPROC) eglGetProcAddress("eglSignalSyncKHR"); |
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154 |
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155 if (signalPointer == NULL) |
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156 { |
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157 return EGL_FALSE; |
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158 } |
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159 else |
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160 { |
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161 return signalPointer(dpy, sync, mode); |
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162 } |
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163 } |
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164 |
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165 |
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166 /*-------------------------------------------------------------------*//*! |
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167 * \brief Query an attribute of the sync object |
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168 * \ingroup api |
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169 * \param dpy Identifier of the display which owns the sync object |
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170 * \param sync Sync object handle. |
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171 * \param attribute An attribute to be retrieved. |
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172 * \param value Pointer to the value for the requested attribute which will be filled on function return. |
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173 * \return EGL_TRUE if an operation was successful and EGL_FALSE otherwise |
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174 * \error EGL_BAD_DISPLAY if <dpy> is not a name of a valid EGLDisplay; |
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175 * EGL_NOT_INITIALIZED if the display object associated with the <dpy> has not been initialized; |
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176 * EGL_BAD_PARAMETER if <sync> is not a valid sync object for <dpy> or if <value> is not |
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177 * a valid pointer; EGL_BAD_ATTRIBUTE if <attribute> does not lie within expected range; |
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178 * EGL_BAD_MATCH if <attribute> is not supported for the type of sync object passed in <sync> |
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179 *//*-------------------------------------------------------------------*/ |
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180 EGLBoolean eglGetSyncAttribKHR( EGLDisplay dpy, |
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181 EGLSyncKHR sync, |
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182 EGLint attribute, |
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183 EGLint *value ) |
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184 { |
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185 PFNEGLGETSYNCATTRIBKHRPROC getAttribPointer = (PFNEGLGETSYNCATTRIBKHRPROC) eglGetProcAddress("eglGetSyncAttribKHR"); |
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186 |
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187 if (getAttribPointer == NULL) |
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188 { |
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189 return EGL_FALSE; |
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190 } |
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191 else |
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192 { |
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193 return getAttribPointer(dpy, sync, attribute, value); |
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194 } |
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195 } |
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196 |
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197 |
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198 |
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199 #ifdef __cplusplus |
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200 } |
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201 #endif |
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202 #endif |