glib编程 (main event loop)
老鱼
posted @ 2010年1月31日 09:06
in c/cplusplus
, 8594 阅读
最简单的例子
int main(int argc,char* argv) { if (g_thread_supported() == 0) g_thread_init(NULL); g_print("g_main_loop_new\n"); loop=g_main_loop_new(NULL,FALSE); g_print("g_main_loop_run\n"); g_main_loop_run(loop); g_print("g_main_loop_unref\n"); g_main_loop_unref(loop); return 0; }
你会发现程序会在 g_main_loop_run函数阻塞,这就是glib main loop了,如果没有人通知它退出,它是不会退出的。
通知循环退出的函数是 g_main_loop_quit。
怎么通知呢?主线程被g_main_loop_run阻塞了,没办法运行quit。本来我准备开一个线 程,sleep一秒钟,然后调用g_main_loop_quit。不过一想我们都在学习高精尖武器了,还用土枪土炮干啥。使用glib的定时器吧~
#include <glib.h> GMainLoop *loop; gint counter = 10; gboolean mycallback(gpointer arg) { g_print("."); if(--counter==0){ g_print("\n"); //exiting lop g_main_loop_quit(loop); return FALSE; } return TRUE; } int main(int argc,char* argv) { if (g_thread_supported() == 0) g_thread_init(NULL); g_print("g_main_loop_new\n"); loop=g_main_loop_new(NULL,FALSE); g_timeout_add(100,mycallback,NULL); g_print("g_main_loop_run\n"); g_main_loop_run(loop); g_print("g_main_loop_unref\n"); g_main_loop_unref(loop); return 0; }
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一秒钟后,程 序正常退出了!
引:http://baicj.spaces.live.com/blog/cns!F60F8E193FAC08E4!410.entry
2014年4月27日 05:50
timer 在glib内部是否是一个线程实现的呢?
2019年9月15日 15:00
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