快速浏览一下文档g_idle_add(), g_idle_add_full(), g_timeout_add(), or g_timeout_add_full()会告诉你:
这在内部创建了一个主循环源,使用g_timeout_source_new()并将其附加到主循环上下文使用g_source_attach()。如果您需要更好的控制,您可以手动执行这些步骤。
请注意,它说它将源附加到主循环context—i.e., a GMainContext, not a GMainLoop。当您创建您的GMainLoop
你正在传递的实例NULL
对于第一个参数。根据the g_main_loop_new() documentation,这个论点是
a GMainContext (if NULL
,将使用默认上下文)。
因此,您正在创建两个主循环,它们都使用相同的上下文(这是默认上下文)。
为了获得我认为您期望的结果,您应该执行以下操作:
#include <glib.h>
gboolean callback(gpointer data)
{
static guint16 i=0;
g_print("Iter=%"G_GUINT16_FORMAT"\n",i++);
if(i%5==0){
g_print("try to stop loop1\n", data);
g_main_loop_quit((GMainLoop*)data);
}
return TRUE;
}
int main()
{
GMainContext* con1 = NULL;
GMainContext* con2 = NULL;
GMainLoop* loop1 = NULL;
GMainLoop* loop2 = NULL;
GSource* source1 = NULL;
con1 = g_main_context_new ();
con2 = g_main_context_new ();
loop1 = g_main_loop_new (con1, FALSE);
loop2 = g_main_loop_new (con2, FALSE);
source1 = g_timeout_source_new_seconds (1);
g_source_set_callback (source1, callback, loop1, NULL);
g_source_attach (source1, con1);
// We don't need the GMainContext anymore—the loop has an internal
// reference so we'll drop ours.
g_main_context_unref (con1);
con1 = NULL;
// Ditto for the GSource
g_source_unref (source1);
source1 = NULL;
g_main_context_unref (con2);
con2 = NULL;
g_print("run loop1\n");
g_main_loop_run(loop1);
// Use g_main_loop_unref, not g_free
g_main_loop_unref(loop1);
loop1 = NULL;
g_print("run loop2\n");
// Note that there is no longer a callback attached here, so it will
// run forever.
g_main_loop_run(loop2);
g_main_loop_unref(loop2);
loop2 = NULL;
return 0;
}