1 /*****************************************************************************
3 * Project ___| | | | _ \| |
5 * | (__| |_| | _ <| |___
6 * \___|\___/|_| \_\_____|
10 * This is a multi threaded application that uses a progress bar to show
11 * status. It uses Gtk+ to make a smooth pulse.
13 * Written by Jud Bishop after studying the other examples provided with
16 * To compile (on a single line):
17 * gcc -ggdb `pkg-config --cflags --libs gtk+-2.0` -lcurl -lssl -lcrypto
18 * -lgthread-2.0 -dl smooth-gtk-thread.c -o smooth-gtk-thread
27 #include <curl/curl.h>
28 #include <curl/types.h> /* new for v7 */
29 #include <curl/easy.h> /* new for v7 */
33 pthread_mutex_t lock = PTHREAD_MUTEX_INITIALIZER;
35 gint num_urls = 9; /* Just make sure this is less than urls[]*/
36 const char * const urls[]= {
48 size_t write_file(void *ptr, size_t size, size_t nmemb, FILE *stream)
50 /* printf("write_file\n"); */
51 return fwrite(ptr, size, nmemb, stream);
54 /* http://xoap.weather.com/weather/local/46214?cc=*&dayf=5&unit=i */
55 void *pull_one_url(void *NaN)
62 /* Stop threads from entering unless j is incremented */
63 pthread_mutex_lock(&lock);
64 while ( j < num_urls )
66 printf("j = %d\n", j);
69 g_strdup_printf("xoap.weather.com/weather/local/%s?cc=*&dayf=5&unit=i\n",
72 printf( "http %s", http );
74 curl = curl_easy_init();
78 outfile = fopen(urls[j], "w");
79 /* printf("fopen\n"); */
81 /* Set the URL and transfer type */
82 curl_easy_setopt(curl, CURLOPT_URL, http);
84 /* Write to the file */
85 curl_easy_setopt(curl, CURLOPT_WRITEDATA, outfile);
86 curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_file);
88 j++; /* critical line */
89 pthread_mutex_unlock(&lock);
91 res = curl_easy_perform(curl);
96 curl_easy_cleanup(curl);
100 /* Adds more latency, testing the mutex.*/
108 gboolean pulse_bar(gpointer data)
111 gtk_progress_bar_pulse (GTK_PROGRESS_BAR (data));
114 /* Return true so the function will be called again;
115 * returning false removes this timeout function.
120 void *create_thread(void *progress_bar)
126 /* Make sure I don't create more threads than urls. */
127 for(i=0; i < NUMT && i < num_urls ; i++) {
128 error = pthread_create(&tid[i],
129 NULL, /* default attributes please */
133 fprintf(stderr, "Couldn't run thread number %d, errno %d\n", i, error);
135 fprintf(stderr, "Thread %d, gets %s\n", i, urls[i]);
138 /* Wait for all threads to terminate. */
139 for(i=0; i < NUMT && i < num_urls; i++) {
140 error = pthread_join(tid[i], NULL);
141 fprintf(stderr, "Thread %d terminated\n", i);
144 /* This stops the pulsing if you have it turned on in the progress bar
146 g_source_remove(GPOINTER_TO_INT(g_object_get_data(G_OBJECT(progress_bar),
149 /* This destroys the progress bar */
150 gtk_widget_destroy(progress_bar);
152 /* [Un]Comment this out to kill the program rather than pushing close. */
153 /* gtk_main_quit(); */
160 static gboolean cb_delete(GtkWidget *window, gpointer data)
166 int main(int argc, char **argv)
168 GtkWidget *top_window, *outside_frame, *inside_frame, *progress_bar;
170 /* Must initialize libcurl before any threads are started */
171 curl_global_init(CURL_GLOBAL_ALL);
176 gdk_threads_enter ();
178 gtk_init(&argc, &argv);
181 top_window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
184 outside_frame = gtk_frame_new(NULL);
185 gtk_frame_set_shadow_type(GTK_FRAME(outside_frame), GTK_SHADOW_OUT);
186 gtk_container_add(GTK_CONTAINER(top_window), outside_frame);
189 inside_frame = gtk_frame_new(NULL);
190 gtk_frame_set_shadow_type(GTK_FRAME(inside_frame), GTK_SHADOW_IN);
191 gtk_container_set_border_width(GTK_CONTAINER(inside_frame), 5);
192 gtk_container_add(GTK_CONTAINER(outside_frame), inside_frame);
195 progress_bar = gtk_progress_bar_new();
196 gtk_progress_bar_pulse (GTK_PROGRESS_BAR (progress_bar));
197 /* Make uniform pulsing */
198 gint pulse_ref = g_timeout_add (300, pulse_bar, progress_bar);
199 g_object_set_data(G_OBJECT(progress_bar), "pulse_id",
200 GINT_TO_POINTER(pulse_ref));
201 gtk_container_add(GTK_CONTAINER(inside_frame), progress_bar);
203 gtk_widget_show_all(top_window);
204 printf("gtk_widget_show_all\n");
206 g_signal_connect(G_OBJECT (top_window), "delete-event",
207 G_CALLBACK(cb_delete), NULL);
209 if (!g_thread_create(&create_thread, progress_bar, FALSE, NULL) != 0)
210 g_warning("can't create the thread");
214 printf("gdk_threads_leave\n");