ui/common/threadpool.c

Mon, 23 Sep 2024 23:22:27 +0200

author
Olaf Wintermann <olaf.wintermann@gmail.com>
date
Mon, 23 Sep 2024 23:22:27 +0200
branch
newapi
changeset 309
02c95df91de1
parent 288
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permissions
-rw-r--r--

add headerbar toggle button (GTK)

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1 /*
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2 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
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3 *
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4 * Copyright 2024 Olaf Wintermann. All rights reserved.
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5 *
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6 * Redistribution and use in source and binary forms, with or without
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7 * modification, are permitted provided that the following conditions are met:
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8 *
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9 * 1. Redistributions of source code must retain the above copyright
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10 * notice, this list of conditions and the following disclaimer.
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11 *
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12 * 2. Redistributions in binary form must reproduce the above copyright
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13 * notice, this list of conditions and the following disclaimer in the
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14 * documentation and/or other materials provided with the distribution.
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15 *
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16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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17 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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19 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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20 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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26 * POSSIBILITY OF SUCH DAMAGE.
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27 */
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28
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29 #include "threadpool.h"
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30 #include "context.h"
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31
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32 #include <pthread.h>
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33
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34 #ifndef _WIN32
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35
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36
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37 static threadpool_job kill_job;
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38
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39 UiThreadpool* threadpool_new(int min, int max) {
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40 UiThreadpool *pool = malloc(sizeof(UiThreadpool));
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41 pool->queue = NULL;
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42 pool->queue_len = 0;
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43 pool->num_idle = 0;
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44 pool->min_threads = min;
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45 pool->max_threads = max;
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46
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47 pthread_mutex_init(&pool->queue_lock, NULL);
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48 pthread_mutex_init(&pool->avlbl_lock, NULL);
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49 pthread_cond_init(&pool->available, NULL);
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50
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51 return pool;
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52 }
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53
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54 int threadpool_start(UiThreadpool *pool) {
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55 /* create pool threads */
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56 for(int i=0;i<pool->min_threads;i++) {
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57 pthread_t t;
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58 if (pthread_create(&t, NULL, threadpool_func, pool) != 0) {
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59 fprintf(stderr, "uic: threadpool_start: pthread_create failed: %s", strerror(errno));
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60 return 1;
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61 }
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62 }
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63 return 0;
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64 }
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65
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66 void* threadpool_func(void *data) {
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67 UiThreadpool *pool = (UiThreadpool*)data;
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68
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69 for(;;) {
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70 threadpool_job *job = threadpool_get_job(pool);
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71 if(job == &kill_job) {
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72 break;
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73 }
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74
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75 job->callback(job->data);
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76
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77 free(job);
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78 }
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79 return NULL;
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80 }
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81
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82 threadpool_job* threadpool_get_job(UiThreadpool *pool) {
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83 pthread_mutex_lock(&pool->queue_lock);
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84
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85 threadpool_job *job = NULL;
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86 pool->num_idle++;
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87 while(job == NULL) {
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88 if(pool->queue_len == 0) {
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89 pthread_cond_wait(&pool->available, &pool->queue_lock);
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90 continue;
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91 } else {
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92 pool_queue_t *q = pool->queue;
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93 job = q->job;
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94 pool->queue = q->next;
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95 pool->queue_len--;
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96 free(q);
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97 }
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98 }
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99 pool->num_idle--;
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100
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101 pthread_mutex_unlock(&pool->queue_lock);
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102 return job;
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103 }
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104
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105 void threadpool_run(UiThreadpool *pool, job_callback_f func, void *data) {
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106 // TODO: handle errors
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107
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108 threadpool_job *job = malloc(sizeof(threadpool_job));
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109 job->callback = func;
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110 job->data = data;
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111
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112 pthread_mutex_lock(&pool->queue_lock);
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113 threadpool_enqueue_job(pool, job);
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114
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115 int create_thread = 0;
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116 int destroy_thread = 0;
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117 int diff = pool->queue_len - pool->num_idle;
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118
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119 //if(pool->queue_len == 1) {
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120 pthread_cond_signal(&pool->available);
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121 //}
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122
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123 pthread_mutex_unlock(&pool->queue_lock);
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124 }
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125
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126 void threadpool_enqueue_job(UiThreadpool *pool, threadpool_job *job) {
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127 pool_queue_t *q = malloc(sizeof(pool_queue_t));
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128 q->job = job;
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129 q->next = NULL;
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130
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131 if(pool->queue == NULL) {
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132 pool->queue = q;
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133 } else {
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134 pool_queue_t *last_elem = pool->queue;
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135 while(last_elem->next != NULL) {
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136 last_elem = last_elem->next;
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137 }
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138 last_elem->next = q;
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139 }
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140 pool->queue_len++;
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141 }
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142
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143
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144
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145
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146
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147
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148 UiThreadpool* ui_threadpool_create(int nthreads) {
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149 UiThreadpool *pool = threadpool_new(nthreads, nthreads);
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150 threadpool_start(pool); // TODO: check return value
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151 return pool;
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152 }
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153
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154 void ui_threadpool_destroy(UiThreadpool* pool) {
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155
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156 }
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157
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158 static int ui_threadpool_job_finish(void *data) {
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159 UiJob *job = data;
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160 UiEvent event;
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161 event.obj = job->obj;
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162 event.window = job->obj->window;
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163 event.document = job->obj->ctx->document;
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164 event.intval = 0;
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165 event.eventdata = NULL;
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166 job->finish_callback(&event, job->finish_data);
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167 free(job);
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168 return 0;
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169 }
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170
280
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171 static void* ui_threadpool_job_func(void *data) {
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172 UiJob *job = data;
288
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173 if (!job->job_func(job->job_data) && job->finish_callback) {
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174 ui_call_mainthread(ui_threadpool_job_finish, job);
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175 } else {
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176 free(job);
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177 }
280
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178 return NULL;
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179 }
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180
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181 void ui_threadpool_job(UiThreadpool* pool, UiObject* obj, ui_threadfunc tf, void* td, ui_callback f, void* fd) {
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182 UiJob* job = malloc(sizeof(UiJob));
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183 job->obj = obj;
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184 job->job_func = tf;
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185 job->job_data = td;
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186 job->finish_callback = f;
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187 job->finish_data = fd;
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188 threadpool_run(pool, ui_threadpool_job_func, job);
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189 }
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190
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191
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192 #endif
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193

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