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/***************************************************************************
* _ _ ____ _
* Project ___| | | | _ \| |
* / __| | | | |_) | |
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
* Copyright (C) 1998 - 2017, Daniel Stenberg, <daniel@haxx.se>, et al.
*
* This software is licensed as described in the file COPYING, which
* you should have received as part of this distribution. The terms
* are also available at https://curl.haxx.se/docs/copyright.html.
*
* You may opt to use, copy, modify, merge, publish, distribute and/or sell
* copies of the Software, and permit persons to whom the Software is
* furnished to do so, under the terms of the COPYING file.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
***************************************************************************/
/* <DESC>
* A multi threaded application that uses a progress bar to show
* status. It uses Gtk+ to make a smooth pulse.
* </DESC>
*/
/*
* Written by Jud Bishop after studying the other examples provided with
* libcurl.
*
* To compile (on a single line):
* gcc -ggdb `pkg-config --cflags --libs gtk+-2.0` -lcurl -lssl -lcrypto
* -lgthread-2.0 -dl smooth-gtk-thread.c -o smooth-gtk-thread
*/
#include <stdio.h>
#include <gtk/gtk.h>
#include <glib.h>
#include <unistd.h>
#include <pthread.h>
#include <curl/curl.h>
#define NUMT 4
pthread_mutex_t lock = PTHREAD_MUTEX_INITIALIZER;
int j = 0;
gint num_urls = 9; /* Just make sure this is less than urls[]*/
const char * const urls[]= {
"90022",
"90023",
"90024",
"90025",
"90026",
"90027",
"90028",
"90029",
"90030"
};
size_t write_file(void *ptr, size_t size, size_t nmemb, FILE *stream)
{
/* printf("write_file\n"); */
return fwrite(ptr, size, nmemb, stream);
}
/* https://weather.com/weather/today/l/46214?cc=*&dayf=5&unit=i */
void *pull_one_url(void *NaN)
{
CURL *curl;
gchar *http;
FILE *outfile;
/* Stop threads from entering unless j is incremented */
pthread_mutex_lock(&lock);
while(j < num_urls) {
printf("j = %d\n", j);
http =
g_strdup_printf("xoap.weather.com/weather/local/%s?cc=*&dayf=5&unit=i\n",
urls[j]);
printf("http %s", http);
curl = curl_easy_init();
if(curl) {
outfile = fopen(urls[j], "wb");
/* Set the URL and transfer type */
curl_easy_setopt(curl, CURLOPT_URL, http);
/* Write to the file */
curl_easy_setopt(curl, CURLOPT_WRITEDATA, outfile);
curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_file);
j++; /* critical line */
pthread_mutex_unlock(&lock);
curl_easy_perform(curl);
fclose(outfile);
printf("fclose\n");
curl_easy_cleanup(curl);
}
g_free(http);
/* Adds more latency, testing the mutex.*/
sleep(1);
} /* end while */
return NULL;
}
gboolean pulse_bar(gpointer data)
{
gdk_threads_enter();
gtk_progress_bar_pulse(GTK_PROGRESS_BAR (data));
gdk_threads_leave();
/* Return true so the function will be called again;
* returning false removes this timeout function.
*/
return TRUE;
}
void *create_thread(void *progress_bar)
{
pthread_t tid[NUMT];
int i;
/* Make sure I don't create more threads than urls. */
for(i = 0; i < NUMT && i < num_urls ; i++) {
int error = pthread_create(&tid[i],
NULL, /* default attributes please */
pull_one_url,
NULL);
if(0 != error)
fprintf(stderr, "Couldn't run thread number %d, errno %d\n", i, error);
else
fprintf(stderr, "Thread %d, gets %s\n", i, urls[i]);
}
/* Wait for all threads to terminate. */
for(i = 0; i < NUMT && i < num_urls; i++) {
pthread_join(tid[i], NULL);
fprintf(stderr, "Thread %d terminated\n", i);
}
/* This stops the pulsing if you have it turned on in the progress bar
section */
g_source_remove(GPOINTER_TO_INT(g_object_get_data(G_OBJECT(progress_bar),
"pulse_id")));
/* This destroys the progress bar */
gtk_widget_destroy(progress_bar);
/* [Un]Comment this out to kill the program rather than pushing close. */
/* gtk_main_quit(); */
return NULL;
}
static gboolean cb_delete(GtkWidget *window, gpointer data)
{
gtk_main_quit();
return FALSE;
}
int main(int argc, char **argv)
{
GtkWidget *top_window, *outside_frame, *inside_frame, *progress_bar;
/* Must initialize libcurl before any threads are started */
curl_global_init(CURL_GLOBAL_ALL);
/* Init thread */
g_thread_init(NULL);
gdk_threads_init();
gdk_threads_enter();
gtk_init(&argc, &argv);
/* Base window */
top_window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
/* Frame */
outside_frame = gtk_frame_new(NULL);
gtk_frame_set_shadow_type(GTK_FRAME(outside_frame), GTK_SHADOW_OUT);
gtk_container_add(GTK_CONTAINER(top_window), outside_frame);
/* Frame */
inside_frame = gtk_frame_new(NULL);
gtk_frame_set_shadow_type(GTK_FRAME(inside_frame), GTK_SHADOW_IN);
gtk_container_set_border_width(GTK_CONTAINER(inside_frame), 5);
gtk_container_add(GTK_CONTAINER(outside_frame), inside_frame);
/* Progress bar */
progress_bar = gtk_progress_bar_new();
gtk_progress_bar_pulse(GTK_PROGRESS_BAR (progress_bar));
/* Make uniform pulsing */
gint pulse_ref = g_timeout_add(300, pulse_bar, progress_bar);
g_object_set_data(G_OBJECT(progress_bar), "pulse_id",
GINT_TO_POINTER(pulse_ref));
gtk_container_add(GTK_CONTAINER(inside_frame), progress_bar);
gtk_widget_show_all(top_window);
printf("gtk_widget_show_all\n");
g_signal_connect(G_OBJECT (top_window), "delete-event",
G_CALLBACK(cb_delete), NULL);
if(!g_thread_create(&create_thread, progress_bar, FALSE, NULL) != 0)
g_warning("can't create the thread");
gtk_main();
gdk_threads_leave();
printf("gdk_threads_leave\n");
return 0;
}
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