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annotate src/video/ps3/SDL_ps3spe.c @ 3150:0cf7bff804ad gsoc2009_ps3

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Code reviewed and added SPE API documentation.
author Martin Lowinski <martin@goldtopf.org>
date Sun, 19 Jul 2009 11:31:47 +0000
parents 0d8d1f870964
children cce01ba54174
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2009 Sam Lantinga
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4
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5 This library is free software; you can redistribute it and/or
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6 modify it under the terms of the GNU Lesser General Public
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7 License as published by the Free Software Foundation; either
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8 version 2.1 of the License, or (at your option) any later version.
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9
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10 This library is distributed in the hope that it will be useful,
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 Lesser General Public License for more details.
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14
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15 You should have received a copy of the GNU Lesser General Public
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16 License along with this library; if not, write to the Free Software
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17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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18
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19 Sam Lantinga
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20 slouken@libsdl.org
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21 */
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22 #include "SDL_config.h"
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23
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24 #include "SDL_video.h"
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25 #include "SDL_ps3spe_c.h"
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26
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27 #include "SDL_ps3video.h"
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28 #include "SDL_ps3render_c.h"
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29
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30
3150
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31 /* This SPE API basically provides 3 ways to run and control a program
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32 * on the SPE:
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33 * - Start and stop the program (keepalive=0).
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34 * SPE_Start() will implicitly boot up the program, create a thread and run
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35 * the context.
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36 * SPE_Stop() will join the (terminated) thread (may block) and return.
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37 * - Boot the program and run it (keepalive=0).
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38 * SPE_Boot() will create a context and load the program and finally start
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39 * the context with SPE_Start().
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40 * SPE_Stop() will savely end the program.
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41 * - Boot, Run and send messages to the program (keepalive=1).
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42 * Start the program by using one of the methods described above. When
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43 * received the READY-message the program is in its infinite loop waiting
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44 * for new messages.
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45 * Every time you run the program, send SPU_START and the address of the
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46 * according struct using SPE_SendMsg().
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47 * SPE_WaitForMsg() will than wait for SPU_FIN and is blocking.
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48 * SPE_Shutdown() sends SPU_EXIT and finally stops the program.
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49 *
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50 * Therefor the SPE program
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51 * - either runs once and returns
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52 * - or runs in an infinite loop and is controlled by messages.
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53 */
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54
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55 /* Start the SPE thread */
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56 int SPE_Start(spu_data_t * spe_data)
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57 {
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58 deprintf(2, "[PS3->SPU] Start SPE: %s\n", spe_data->program_name);
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59 if (!(spe_data->booted))
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60 SPE_Boot(spe_data);
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61
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62 /* To allow re-running of context, spe_ctx_entry has to be set before each call */
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63 spe_data->entry = SPE_DEFAULT_ENTRY;
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64 spe_data->error_code = 0;
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65
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66 /* Create SPE thread and run */
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67 deprintf(2, "[PS3->SPU] Create Thread: %s\n", spe_data->program_name);
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68 if (pthread_create
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69 (&spe_data->thread, NULL, (void *)&SPE_RunContext, (void *)spe_data)) {
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70 deprintf(2, "[PS3->SPU] Could not create pthread for spe: %s\n", spe_data->program_name);
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71 SDL_SetError("[PS3->SPU] Could not create pthread for spe");
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72 return -1;
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73 }
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74
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75 if (spe_data->keepalive)
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76 SPE_WaitForMsg(spe_data, SPU_READY);
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77 }
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78
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79 /* Stop the SPE thread */
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80 int SPE_Stop(spu_data_t * spe_data)
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81 {
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82 deprintf(2, "[PS3->SPU] Stop SPE: %s\n", spe_data->program_name);
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83 /* Wait for SPE thread to complete */
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84 deprintf(2, "[PS3->SPU] Wait for SPE thread to complete: %s\n", spe_data->program_name);
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85 if (pthread_join(spe_data->thread, NULL)) {
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86 deprintf(2, "[PS3->SPU] Failed joining the thread: %s\n", spe_data->program_name);
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87 SDL_SetError("[PS3->SPU] Failed joining the thread");
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88 return -1;
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89 }
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90
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91 return 0;
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92 }
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93
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94 /* Create SPE context and load program */
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95 int SPE_Boot(spu_data_t * spe_data)
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96 {
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97 /* Create SPE context */
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98 deprintf(2, "[PS3->SPU] Create SPE Context: %s\n", spe_data->program_name);
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99 spe_data->ctx = spe_context_create(0, NULL);
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100 if (spe_data->ctx == NULL) {
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101 deprintf(2, "[PS3->SPU] Failed creating SPE context: %s\n", spe_data->program_name);
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102 SDL_SetError("[PS3->SPU] Failed creating SPE context");
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103 return -1;
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104 }
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105
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106 /* Load SPE object into SPE local store */
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107 deprintf(2, "[PS3->SPU] Load Program into SPE: %s\n", spe_data->program_name);
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108 if (spe_program_load(spe_data->ctx, &spe_data->program)) {
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109 deprintf(2, "[PS3->SPU] Failed loading program into SPE context: %s\n", spe_data->program_name);
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110 SDL_SetError
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111 ("[PS3->SPU] Failed loading program into SPE context");
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112 return -1;
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113 }
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114 spe_data->booted = 1;
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115 deprintf(2, "[PS3->SPU] SPE boot successful\n");
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116
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117 return 0;
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118 }
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119
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120 /* (Stop and) shutdown the SPE */
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121 int SPE_Shutdown(spu_data_t * spe_data)
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122 {
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123 if (spe_data->keepalive && spe_data->booted) {
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124 SPE_SendMsg(spe_data, SPU_EXIT);
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125 SPE_Stop(spe_data);
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126 }
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127
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128 /* Destroy SPE context */
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129 deprintf(2, "[PS3->SPU] Destroy SPE context: %s\n", spe_data->program_name);
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130 if (spe_context_destroy(spe_data->ctx)) {
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131 deprintf(2, "[PS3->SPU] Failed destroying context: %s\n", spe_data->program_name);
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132 SDL_SetError("[PS3->SPU] Failed destroying context");
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133 return -1;
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134 }
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135 deprintf(2, "[PS3->SPU] SPE shutdown successful: %s\n", spe_data->program_name);
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136 return 0;
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137 }
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138
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139 /* Send message to the SPE via mailboxe */
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140 int SPE_SendMsg(spu_data_t * spe_data, unsigned int msg)
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141 {
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142 deprintf(2, "[PS3->SPU] Sending message %u to %s\n", msg, spe_data->program_name);
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143 /* Send one message, block until message was sent */
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144 unsigned int spe_in_mbox_msgs[1];
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145 spe_in_mbox_msgs[0] = msg;
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146 int in_mbox_write = spe_in_mbox_write(spe_data->ctx, spe_in_mbox_msgs, 1, SPE_MBOX_ALL_BLOCKING);
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147
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148 if (1 > in_mbox_write) {
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149 deprintf(2, "[PS3->SPU] No message could be written to %s\n", spe_data->program_name);
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150 SDL_SetError("[PS3->SPU] No message could be written");
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151 return -1;
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152 }
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153 return 0;
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154 }
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155
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156
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157 /* Read 1 message from SPE, block until at least 1 message was received */
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158 int SPE_WaitForMsg(spu_data_t * spe_data, unsigned int msg)
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159 {
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160 deprintf(2, "[PS3->SPU] Waiting for message from %s\n", spe_data->program_name);
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161 unsigned int out_messages[1];
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162 while (!spe_out_mbox_status(spe_data->ctx));
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163 int mbox_read = spe_out_mbox_read(spe_data->ctx, out_messages, 1);
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164 deprintf(2, "[PS3->SPU] Got message from %s, message was %u\n", spe_data->program_name, out_messages[0]);
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165 if (out_messages[0] == msg)
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166 return 0;
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167 else
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168 return -1;
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169 }
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170
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171 /* Re-runnable invocation of the spe_context_run call */
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172 void SPE_RunContext(void *thread_argp)
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173 {
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174 /* argp is the pointer to argument to be passed to the SPE program */
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175 spu_data_t *args = (spu_data_t *) thread_argp;
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176 deprintf(3, "[PS3->SPU] void* argp=0x%x\n", (unsigned int)args->argp);
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177
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178 /* Run it.. */
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179 deprintf(2, "[PS3->SPU] Run SPE program: %s\n", args->program_name);
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180 if (spe_context_run
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181 (args->ctx, &args->entry, 0, (void *)args->argp, NULL,
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182 NULL) < 0) {
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183 deprintf(2, "[PS3->SPU] Failed running SPE context: %s\n", args->program_name);
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184 SDL_SetError("[PS3->SPU] Failed running SPE context: %s", args->program_name);
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185 exit(1);
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186 }
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187
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188 pthread_exit(NULL);
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189 }
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190
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191 /* vi: set ts=4 sw=4 expandtab: */