1 /*************************************************************************** 2 * _ _ ____ _ 3 * Project ___| | | | _ \| | 4 * / __| | | | |_) | | 5 * | (__| |_| | _ <| |___ 6 * \___|\___/|_| \_\_____| 7 * 8 * Copyright (C) 1998 - 2017, Daniel Stenberg, <daniel (at) haxx.se>, et al. 9 * 10 * This software is licensed as described in the file COPYING, which 11 * you should have received as part of this distribution. The terms 12 * are also available at https://curl.haxx.se/docs/copyright.html. 13 * 14 * You may opt to use, copy, modify, merge, publish, distribute and/or sell 15 * copies of the Software, and permit persons to whom the Software is 16 * furnished to do so, under the terms of the COPYING file. 17 * 18 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY 19 * KIND, either express or implied. 20 * 21 ***************************************************************************/ 22 /* <DESC> 23 * A multi threaded application that uses a progress bar to show 24 * status. It uses Gtk+ to make a smooth pulse. 25 * </DESC> 26 */ 27 /* 28 * Written by Jud Bishop after studying the other examples provided with 29 * libcurl. 30 * 31 * To compile (on a single line): 32 * gcc -ggdb `pkg-config --cflags --libs gtk+-2.0` -lcurl -lssl -lcrypto 33 * -lgthread-2.0 -dl smooth-gtk-thread.c -o smooth-gtk-thread 34 */ 35 36 #include <stdio.h> 37 #include <gtk/gtk.h> 38 #include <glib.h> 39 #include <unistd.h> 40 #include <pthread.h> 41 42 #include <curl/curl.h> 43 44 #define NUMT 4 45 46 pthread_mutex_t lock = PTHREAD_MUTEX_INITIALIZER; 47 int j = 0; 48 gint num_urls = 9; /* Just make sure this is less than urls[]*/ 49 const char * const urls[]= { 50 "90022", 51 "90023", 52 "90024", 53 "90025", 54 "90026", 55 "90027", 56 "90028", 57 "90029", 58 "90030" 59 }; 60 61 size_t write_file(void *ptr, size_t size, size_t nmemb, FILE *stream) 62 { 63 /* printf("write_file\n"); */ 64 return fwrite(ptr, size, nmemb, stream); 65 } 66 67 /* http://xoap.weather.com/weather/local/46214?cc=*&dayf=5&unit=i */ 68 void *pull_one_url(void *NaN) 69 { 70 CURL *curl; 71 CURLcode res; 72 gchar *http; 73 FILE *outfile; 74 75 /* Stop threads from entering unless j is incremented */ 76 pthread_mutex_lock(&lock); 77 while(j < num_urls) { 78 printf("j = %d\n", j); 79 80 http = 81 g_strdup_printf("xoap.weather.com/weather/local/%s?cc=*&dayf=5&unit=i\n", 82 urls[j]); 83 84 printf("http %s", http); 85 86 curl = curl_easy_init(); 87 if(curl) { 88 89 outfile = fopen(urls[j], "wb"); 90 91 /* Set the URL and transfer type */ 92 curl_easy_setopt(curl, CURLOPT_URL, http); 93 94 /* Write to the file */ 95 curl_easy_setopt(curl, CURLOPT_WRITEDATA, outfile); 96 curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_file); 97 98 j++; /* critical line */ 99 pthread_mutex_unlock(&lock); 100 101 res = curl_easy_perform(curl); 102 103 fclose(outfile); 104 printf("fclose\n"); 105 106 curl_easy_cleanup(curl); 107 } 108 g_free(http); 109 110 /* Adds more latency, testing the mutex.*/ 111 sleep(1); 112 113 } /* end while */ 114 return NULL; 115 } 116 117 118 gboolean pulse_bar(gpointer data) 119 { 120 gdk_threads_enter(); 121 gtk_progress_bar_pulse(GTK_PROGRESS_BAR (data)); 122 gdk_threads_leave(); 123 124 /* Return true so the function will be called again; 125 * returning false removes this timeout function. 126 */ 127 return TRUE; 128 } 129 130 void *create_thread(void *progress_bar) 131 { 132 pthread_t tid[NUMT]; 133 int i; 134 int error; 135 136 /* Make sure I don't create more threads than urls. */ 137 for(i = 0; i < NUMT && i < num_urls ; i++) { 138 error = pthread_create(&tid[i], 139 NULL, /* default attributes please */ 140 pull_one_url, 141 NULL); 142 if(0 != error) 143 fprintf(stderr, "Couldn't run thread number %d, errno %d\n", i, error); 144 else 145 fprintf(stderr, "Thread %d, gets %s\n", i, urls[i]); 146 } 147 148 /* Wait for all threads to terminate. */ 149 for(i = 0; i < NUMT && i < num_urls; i++) { 150 error = pthread_join(tid[i], NULL); 151 fprintf(stderr, "Thread %d terminated\n", i); 152 } 153 154 /* This stops the pulsing if you have it turned on in the progress bar 155 section */ 156 g_source_remove(GPOINTER_TO_INT(g_object_get_data(G_OBJECT(progress_bar), 157 "pulse_id"))); 158 159 /* This destroys the progress bar */ 160 gtk_widget_destroy(progress_bar); 161 162 /* [Un]Comment this out to kill the program rather than pushing close. */ 163 /* gtk_main_quit(); */ 164 165 166 return NULL; 167 168 } 169 170 static gboolean cb_delete(GtkWidget *window, gpointer data) 171 { 172 gtk_main_quit(); 173 return FALSE; 174 } 175 176 int main(int argc, char **argv) 177 { 178 GtkWidget *top_window, *outside_frame, *inside_frame, *progress_bar; 179 180 /* Must initialize libcurl before any threads are started */ 181 curl_global_init(CURL_GLOBAL_ALL); 182 183 /* Init thread */ 184 g_thread_init(NULL); 185 gdk_threads_init(); 186 gdk_threads_enter(); 187 188 gtk_init(&argc, &argv); 189 190 /* Base window */ 191 top_window = gtk_window_new(GTK_WINDOW_TOPLEVEL); 192 193 /* Frame */ 194 outside_frame = gtk_frame_new(NULL); 195 gtk_frame_set_shadow_type(GTK_FRAME(outside_frame), GTK_SHADOW_OUT); 196 gtk_container_add(GTK_CONTAINER(top_window), outside_frame); 197 198 /* Frame */ 199 inside_frame = gtk_frame_new(NULL); 200 gtk_frame_set_shadow_type(GTK_FRAME(inside_frame), GTK_SHADOW_IN); 201 gtk_container_set_border_width(GTK_CONTAINER(inside_frame), 5); 202 gtk_container_add(GTK_CONTAINER(outside_frame), inside_frame); 203 204 /* Progress bar */ 205 progress_bar = gtk_progress_bar_new(); 206 gtk_progress_bar_pulse(GTK_PROGRESS_BAR (progress_bar)); 207 /* Make uniform pulsing */ 208 gint pulse_ref = g_timeout_add(300, pulse_bar, progress_bar); 209 g_object_set_data(G_OBJECT(progress_bar), "pulse_id", 210 GINT_TO_POINTER(pulse_ref)); 211 gtk_container_add(GTK_CONTAINER(inside_frame), progress_bar); 212 213 gtk_widget_show_all(top_window); 214 printf("gtk_widget_show_all\n"); 215 216 g_signal_connect(G_OBJECT (top_window), "delete-event", 217 G_CALLBACK(cb_delete), NULL); 218 219 if(!g_thread_create(&create_thread, progress_bar, FALSE, NULL) != 0) 220 g_warning("can't create the thread"); 221 222 gtk_main(); 223 gdk_threads_leave(); 224 printf("gdk_threads_leave\n"); 225 226 return 0; 227 } 228
