1 /*****************************************************************************
3 * Project ___| | | | _ \| |
5 * | (__| |_| | _ <| |___
6 * \___|\___/|_| \_\_____|
9 * This is a multi threaded application that uses a progress bar to show
10 * status. It uses Gtk+ to make a smooth pulse.
12 * Written by Jud Bishop after studying the other examples provided with
15 * To compile (on a single line):
16 * gcc -ggdb `pkg-config --cflags --libs gtk+-2.0` -lcurl -lssl -lcrypto
17 * -lgthread-2.0 -dl smooth-gtk-thread.c -o smooth-gtk-thread
26 #include <curl/curl.h>
27 #include <curl/types.h> /* new for v7 */
28 #include <curl/easy.h> /* new for v7 */
32 pthread_mutex_t lock = PTHREAD_MUTEX_INITIALIZER;
34 gint num_urls = 9; /* Just make sure this is less than urls[]*/
35 const char * const urls[]= {
47 size_t write_file(void *ptr, size_t size, size_t nmemb, FILE *stream)
49 /* printf("write_file\n"); */
50 return fwrite(ptr, size, nmemb, stream);
53 /* http://xoap.weather.com/weather/local/46214?cc=*&dayf=5&unit=i */
54 void *pull_one_url(void *NaN)
61 /* Stop threads from entering unless j is incremented */
62 pthread_mutex_lock(&lock);
63 while ( j < num_urls )
65 printf("j = %d\n", j);
68 g_strdup_printf("xoap.weather.com/weather/local/%s?cc=*&dayf=5&unit=i\n",
71 printf( "http %s", http );
73 curl = curl_easy_init();
77 outfile = fopen(urls[j], "w");
78 /* printf("fopen\n"); */
80 /* Set the URL and transfer type */
81 curl_easy_setopt(curl, CURLOPT_URL, http);
83 /* Write to the file */
84 curl_easy_setopt(curl, CURLOPT_WRITEDATA, outfile);
85 curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_file);
87 j++; /* critical line */
88 pthread_mutex_unlock(&lock);
90 res = curl_easy_perform(curl);
95 curl_easy_cleanup(curl);
99 /* Adds more latency, testing the mutex.*/
107 gboolean pulse_bar(gpointer data)
110 gtk_progress_bar_pulse (GTK_PROGRESS_BAR (data));
113 /* Return true so the function will be called again;
114 * returning false removes this timeout function.
119 void *create_thread(void *progress_bar)
125 /* Make sure I don't create more threads than urls. */
126 for(i=0; i < NUMT && i < num_urls ; i++) {
127 error = pthread_create(&tid[i],
128 NULL, /* default attributes please */
132 fprintf(stderr, "Couldn't run thread number %d, errno %d\n", i, error);
134 fprintf(stderr, "Thread %d, gets %s\n", i, urls[i]);
137 /* Wait for all threads to terminate. */
138 for(i=0; i < NUMT && i < num_urls; i++) {
139 error = pthread_join(tid[i], NULL);
140 fprintf(stderr, "Thread %d terminated\n", i);
143 /* This stops the pulsing if you have it turned on in the progress bar
145 g_source_remove(GPOINTER_TO_INT(g_object_get_data(G_OBJECT(progress_bar),
148 /* This destroys the progress bar */
149 gtk_widget_destroy(progress_bar);
151 /* [Un]Comment this out to kill the program rather than pushing close. */
152 /* gtk_main_quit(); */
159 static gboolean cb_delete(GtkWidget *window, gpointer data)
165 int main(int argc, char **argv)
167 GtkWidget *top_window, *outside_frame, *inside_frame, *progress_bar;
169 /* Must initialize libcurl before any threads are started */
170 curl_global_init(CURL_GLOBAL_ALL);
175 gdk_threads_enter ();
177 gtk_init(&argc, &argv);
180 top_window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
183 outside_frame = gtk_frame_new(NULL);
184 gtk_frame_set_shadow_type(GTK_FRAME(outside_frame), GTK_SHADOW_OUT);
185 gtk_container_add(GTK_CONTAINER(top_window), outside_frame);
188 inside_frame = gtk_frame_new(NULL);
189 gtk_frame_set_shadow_type(GTK_FRAME(inside_frame), GTK_SHADOW_IN);
190 gtk_container_set_border_width(GTK_CONTAINER(inside_frame), 5);
191 gtk_container_add(GTK_CONTAINER(outside_frame), inside_frame);
194 progress_bar = gtk_progress_bar_new();
195 gtk_progress_bar_pulse (GTK_PROGRESS_BAR (progress_bar));
196 /* Make uniform pulsing */
197 gint pulse_ref = g_timeout_add (300, pulse_bar, progress_bar);
198 g_object_set_data(G_OBJECT(progress_bar), "pulse_id",
199 GINT_TO_POINTER(pulse_ref));
200 gtk_container_add(GTK_CONTAINER(inside_frame), progress_bar);
202 gtk_widget_show_all(top_window);
203 printf("gtk_widget_show_all\n");
205 g_signal_connect(G_OBJECT (top_window), "delete-event",
206 G_CALLBACK(cb_delete), NULL);
208 if (!g_thread_create(&create_thread, progress_bar, FALSE, NULL) != 0)
209 g_warning("can't create the thread");
213 printf("gdk_threads_leave\n");