smooth-gtk-thread.c (5980B)
1 /*************************************************************************** 2 * _ _ ____ _ 3 * Project ___| | | | _ \| | 4 * / __| | | | |_) | | 5 * | (__| |_| | _ <| |___ 6 * \___|\___/|_| \_\_____| 7 * 8 * Copyright (C) Daniel Stenberg, <daniel@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.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 * SPDX-License-Identifier: curl 22 * 23 ***************************************************************************/ 24 /* <DESC> 25 * A multi threaded application that uses a progress bar to show 26 * status. It uses Gtk+ to make a smooth pulse. 27 * </DESC> 28 */ 29 /* 30 * Written by Jud Bishop after studying the other examples provided with 31 * libcurl. 32 * 33 * To compile (on a single line): 34 * gcc -ggdb `pkg-config --cflags --libs gtk+-2.0` -lcurl -lssl -lcrypto 35 * -lgthread-2.0 -dl smooth-gtk-thread.c -o smooth-gtk-thread 36 */ 37 38 #include <stdio.h> 39 #include <gtk/gtk.h> 40 #include <glib.h> 41 #include <unistd.h> 42 #include <pthread.h> 43 44 #include <curl/curl.h> 45 46 #define NUMT 4 47 48 pthread_mutex_t lock = PTHREAD_MUTEX_INITIALIZER; 49 int j = 0; 50 gint num_urls = 9; /* Just make sure this is less than urls[]*/ 51 const char * const urls[]= { 52 "90022", 53 "90023", 54 "90024", 55 "90025", 56 "90026", 57 "90027", 58 "90028", 59 "90029", 60 "90030" 61 }; 62 63 size_t write_file(void *ptr, size_t size, size_t nmemb, FILE *stream) 64 { 65 return fwrite(ptr, size, nmemb, stream); 66 } 67 68 static void run_one(gchar *http, int j) 69 { 70 FILE *outfile = fopen(urls[j], "wb"); 71 CURL *curl; 72 73 curl = curl_easy_init(); 74 if(curl) { 75 printf("j = %d\n", j); 76 77 /* Set the URL and transfer type */ 78 curl_easy_setopt(curl, CURLOPT_URL, http); 79 80 /* Write to the file */ 81 curl_easy_setopt(curl, CURLOPT_WRITEDATA, outfile); 82 curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_file); 83 curl_easy_perform(curl); 84 85 fclose(outfile); 86 curl_easy_cleanup(curl); 87 } 88 } 89 90 void *pull_one_url(void *NaN) 91 { 92 /* protect the reading and increasing of 'j' with a mutex */ 93 pthread_mutex_lock(&lock); 94 while(j < num_urls) { 95 int i = j; 96 j++; 97 pthread_mutex_unlock(&lock); 98 http = g_strdup_printf("https://example.com/%s", urls[i]); 99 if(http) { 100 run_one(http, i); 101 g_free(http); 102 } 103 pthread_mutex_lock(&lock); 104 } 105 pthread_mutex_unlock(&lock); 106 return NULL; 107 } 108 109 110 gboolean pulse_bar(gpointer data) 111 { 112 gdk_threads_enter(); 113 gtk_progress_bar_pulse(GTK_PROGRESS_BAR (data)); 114 gdk_threads_leave(); 115 116 /* Return true so the function is called again; returning false removes this 117 * timeout function. 118 */ 119 return TRUE; 120 } 121 122 void *create_thread(void *progress_bar) 123 { 124 pthread_t tid[NUMT]; 125 int i; 126 127 /* Make sure I do not create more threads than urls. */ 128 for(i = 0; i < NUMT && i < num_urls ; i++) { 129 int error = pthread_create(&tid[i], 130 NULL, /* default attributes please */ 131 pull_one_url, 132 NULL); 133 if(0 != error) 134 fprintf(stderr, "Couldn't run thread number %d, errno %d\n", i, error); 135 else 136 fprintf(stderr, "Thread %d, gets %s\n", i, urls[i]); 137 } 138 139 /* Wait for all threads to terminate. */ 140 for(i = 0; i < NUMT && i < num_urls; i++) { 141 pthread_join(tid[i], NULL); 142 fprintf(stderr, "Thread %d terminated\n", i); 143 } 144 145 /* This stops the pulsing if you have it turned on in the progress bar 146 section */ 147 g_source_remove(GPOINTER_TO_INT(g_object_get_data(G_OBJECT(progress_bar), 148 "pulse_id"))); 149 150 /* This destroys the progress bar */ 151 gtk_widget_destroy(progress_bar); 152 153 /* [Un]Comment this out to kill the program rather than pushing close. */ 154 /* gtk_main_quit(); */ 155 156 157 return NULL; 158 159 } 160 161 static gboolean cb_delete(GtkWidget *window, gpointer data) 162 { 163 gtk_main_quit(); 164 return FALSE; 165 } 166 167 int main(int argc, char **argv) 168 { 169 GtkWidget *top_window, *outside_frame, *inside_frame, *progress_bar; 170 171 /* Must initialize libcurl before any threads are started */ 172 curl_global_init(CURL_GLOBAL_ALL); 173 174 /* Init thread */ 175 g_thread_init(NULL); 176 gdk_threads_init(); 177 gdk_threads_enter(); 178 179 gtk_init(&argc, &argv); 180 181 /* Base window */ 182 top_window = gtk_window_new(GTK_WINDOW_TOPLEVEL); 183 184 /* Frame */ 185 outside_frame = gtk_frame_new(NULL); 186 gtk_frame_set_shadow_type(GTK_FRAME(outside_frame), GTK_SHADOW_OUT); 187 gtk_container_add(GTK_CONTAINER(top_window), outside_frame); 188 189 /* Frame */ 190 inside_frame = gtk_frame_new(NULL); 191 gtk_frame_set_shadow_type(GTK_FRAME(inside_frame), GTK_SHADOW_IN); 192 gtk_container_set_border_width(GTK_CONTAINER(inside_frame), 5); 193 gtk_container_add(GTK_CONTAINER(outside_frame), inside_frame); 194 195 /* Progress bar */ 196 progress_bar = gtk_progress_bar_new(); 197 gtk_progress_bar_pulse(GTK_PROGRESS_BAR (progress_bar)); 198 /* Make uniform pulsing */ 199 gint pulse_ref = g_timeout_add(300, pulse_bar, progress_bar); 200 g_object_set_data(G_OBJECT(progress_bar), "pulse_id", 201 GINT_TO_POINTER(pulse_ref)); 202 gtk_container_add(GTK_CONTAINER(inside_frame), progress_bar); 203 204 gtk_widget_show_all(top_window); 205 printf("gtk_widget_show_all\n"); 206 207 g_signal_connect(G_OBJECT (top_window), "delete-event", 208 G_CALLBACK(cb_delete), NULL); 209 210 if(!g_thread_create(&create_thread, progress_bar, FALSE, NULL) != 0) 211 g_warning("cannot create the thread"); 212 213 gtk_main(); 214 gdk_threads_leave(); 215 printf("gdk_threads_leave\n"); 216 217 return 0; 218 }