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Test a first glib mainloop.

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This commit is contained in:
Dave Davenport 2016-01-18 20:51:35 +01:00
parent 94cbe3a005
commit 80a6aa4549
2 changed files with 113 additions and 161 deletions
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18
include/textbox.h
View file

@ -40,15 +40,15 @@ typedef struct
typedef enum
{
TB_AUTOHEIGHT = 1 << 0,
TB_AUTOWIDTH = 1 << 1,
TB_LEFT = 1 << 16,
TB_RIGHT = 1 << 17,
TB_CENTER = 1 << 18,
TB_EDITABLE = 1 << 19,
TB_MARKUP = 1 << 20,
TB_WRAP = 1 << 21,
TB_PASSWORD = 1 << 22,
TB_AUTOHEIGHT = 1 << 0,
TB_AUTOWIDTH = 1 << 1,
TB_LEFT = 1 << 16,
TB_RIGHT = 1 << 17,
TB_CENTER = 1 << 18,
TB_EDITABLE = 1 << 19,
TB_MARKUP = 1 << 20,
TB_WRAP = 1 << 21,
TB_PASSWORD = 1 << 22,
} TextboxFlags;
typedef enum

256
source/rofi.c
View file

@ -45,6 +45,8 @@
#include <sys/wait.h>
#include <sys/types.h>
#include <glib-unix.h>
#include <cairo.h>
#include <cairo-xlib.h>
@ -100,6 +102,7 @@ XIM xim;
XIC xic;
GThreadPool *tpool = NULL;
GMainLoop *main_loop;
static char * get_matching_state ( void )
{
@ -2157,68 +2160,6 @@ static void reload_configuration ()
}
}
/**
* Separate thread that handles signals being send to rofi.
* Currently it listens for three signals:
* * HUP: reload the configuration.
* * INT: Quit the program.
* * USR1: Dump the current configuration to stdout.
*
* These messages are relayed to the main thread via a pipe, the write side of the pipe is passed
* as argument to this thread.
* When receiving a sig-int the thread quits.
*/
static gpointer rofi_signal_handler_process ( gpointer arg )
{
int pfd = *( (int *) arg );
// Create same mask again.
sigset_t set;
sigemptyset ( &set );
sigaddset ( &set, SIGHUP );
sigaddset ( &set, SIGINT );
sigaddset ( &set, SIGUSR1 );
// loop forever.
while ( 1 ) {
#ifdef __OpenBSD__
int sig = 0;
if ( sigwait ( &set, &sig ) < 0 ) {
perror ( "sigwaitinfo failed, lets restart" );
}
#else
siginfo_t info;
int sig = sigwaitinfo ( &set, &info );
if ( sig < 0 ) {
perror ( "sigwaitinfo failed, lets restart" );
}
#endif
else {
// Send message to main thread.
if ( sig == SIGHUP ) {
ssize_t t = write ( pfd, "c", 1 );
if ( t < 0 ) {
fprintf ( stderr, "Failed to send signal to main thread.\n" );
}
}
if ( sig == SIGUSR1 ) {
ssize_t t = write ( pfd, "i", 1 );
if ( t < 0 ) {
fprintf ( stderr, "Failed to send signal to main thread.\n" );
}
}
if ( sig == SIGINT ) {
ssize_t t = write ( pfd, "q", 1 );
if ( t < 0 ) {
fprintf ( stderr, "Failed to send signal to main thread.\n" );
}
// Close my end and exit.
g_thread_exit ( NULL );
}
}
}
return NULL;
}
/**
* Process X11 events in the main-loop (gui-thread) of the application.
*/
@ -2249,34 +2190,30 @@ static void main_loop_x11_event_handler ( void )
*
* returns TRUE when mainloop should be stopped.
*/
static int main_loop_signal_handler ( char command, int quiet )
static gboolean main_loop_signal_handler_hup ( G_GNUC_UNUSED gpointer data )
{
if ( command == 'c' ) {
if ( !quiet ) {
fprintf ( stdout, "Reload configuration\n" );
}
// Release the keybindings.
release_global_keybindings ();
// Reload config
reload_configuration ();
// Grab the possibly new keybindings.
grab_global_keybindings ();
if ( !quiet ) {
print_global_keybindings ();
}
// We need to flush, otherwise the first key presses are not caught.
XFlush ( display );
}
// Got message to quit.
else if ( command == 'q' ) {
// Break out of loop.
return TRUE;
}
// Got message to print info
else if ( command == 'i' ) {
config_parse_xresource_dump ();
}
return FALSE;
fprintf ( stdout, "Reload configuration\n" );
// Release the keybindings.
release_global_keybindings ();
// Reload config
reload_configuration ();
// Grab the possibly new keybindings.
grab_global_keybindings ();
// We need to flush, otherwise the first key presses are not caught.
XFlush ( display );
return G_SOURCE_CONTINUE;
}
static gboolean main_loop_signal_handler_term ( G_GNUC_UNUSED gpointer data )
{
// Break out of loop.
g_main_loop_quit ( main_loop );
return G_SOURCE_CONTINUE;
}
static gboolean main_loop_signal_handler_usr1 ( G_GNUC_UNUSED gpointer data )
{
config_parse_xresource_dump ();
return G_SOURCE_CONTINUE;
}
ModeMode switcher_run ( char **input, Mode *sw )
@ -2288,31 +2225,58 @@ ModeMode switcher_run ( char **input, Mode *sw )
return mode_result ( sw, mretv, input, selected_line );
}
/**
* Setup signal handling.
* Block all the signals, start a signal processor thread to handle these events.
*/
static GThread *setup_signal_thread ( int *fd )
{
// Block all HUP,INT,USR1 signals.
// In this and other child (they inherit mask)
sigset_t set;
sigemptyset ( &set );
sigaddset ( &set, SIGHUP );
sigaddset ( &set, SIGINT );
sigaddset ( &set, SIGUSR1 );
sigprocmask ( SIG_BLOCK, &set, NULL );
// Create signal handler process.
// This will use sigwaitinfo to read signals and forward them back to the main thread again.
return g_thread_new ( "signal_process", rofi_signal_handler_process, (void *) fd );
}
static int error_trap_depth = 0;
static void error_trap_push ( G_GNUC_UNUSED SnDisplay *display, G_GNUC_UNUSED Display *xdisplay )
{
++error_trap_depth;
}
/**
* Custom X11 Source implementation.
*/
typedef struct _X11EventSource
{
// Source
GSource source;
// Polling field
GPollFD fd_x11;
} X11EventSource;
static gboolean x11_event_source_prepare ( G_GNUC_UNUSED GSource * base, gint * timeout )
{
*timeout = -1;
return XPending ( display );
}
static gboolean x11_event_source_check ( GSource * base )
{
X11EventSource *xs = (X11EventSource *) base;
if ( xs->fd_x11.revents ) {
return TRUE;
}
return FALSE;
}
static gboolean x11_event_source_dispatch ( GSource * base, GSourceFunc callback, gpointer data )
{
X11EventSource *xs = (X11EventSource *) base;
if ( xs->fd_x11.revents ) {
printf ( "x11\n" );
main_loop_x11_event_handler ();
}
if ( callback ) {
callback ( data );
}
return G_SOURCE_CONTINUE;;
}
static GSourceFuncs x11_event_source_funcs = {
x11_event_source_prepare,
x11_event_source_check,
x11_event_source_dispatch,
NULL
};
static void error_trap_pop ( G_GNUC_UNUSED SnDisplay *display, Display *xdisplay )
{
if ( error_trap_depth == 0 ) {
@ -2529,16 +2493,6 @@ int main ( int argc, char *argv[] )
print_global_keybindings ();
}
// Create a pipe to communicate between signal thread an main thread.
int pfds[2];
if ( pipe ( pfds ) != 0 ) {
char * msg = g_strdup_printf ( "Failed to start rofi: '<i>%s</i>'", strerror ( errno ) );
show_error_message ( msg, TRUE );
g_free ( msg );
exit ( EXIT_FAILURE );
}
GThread *pid_signal_proc = setup_signal_thread ( &( pfds[1] ) );
// done starting deamon.
if ( sncontext != NULL ) {
@ -2550,43 +2504,41 @@ int main ( int argc, char *argv[] )
// It also listens from messages from the signal process.
XSelectInput ( display, DefaultRootWindow ( display ), KeyPressMask );
XFlush ( display );
int x11_fd = ConnectionNumber ( display );
for (;; ) {
fd_set in_fds;
// Create a File Description Set containing x11_fd, and signal pipe
FD_ZERO ( &in_fds );
FD_SET ( x11_fd, &in_fds );
FD_SET ( pfds[0], &in_fds );
int x11_fd = ConnectionNumber ( display );
// Wait for X Event or a message on signal pipe
if ( select ( MAX ( x11_fd, pfds[0] ) + 1, &in_fds, 0, 0, NULL ) >= 0 ) {
// X11
if ( FD_ISSET ( x11_fd, &in_fds ) ) {
main_loop_x11_event_handler ();
}
// Signal Pipe
if ( FD_ISSET ( pfds[0], &in_fds ) ) {
// The signal thread send us a message. Process it.
char c;
ssize_t r = read ( pfds[0], &c, 1 );
if ( r < 0 ) {
fprintf ( stderr, "Failed to read data from signal thread: %s\n", strerror ( errno ) );
}
// Process the signal in the main_loop.
else if ( main_loop_signal_handler ( c, quiet ) ) {
break;
}
}
}
}
X11EventSource *source = (X11EventSource *) g_source_new ( &x11_event_source_funcs, sizeof ( X11EventSource ) );
source->fd_x11.fd = x11_fd;
source->fd_x11.events = G_IO_IN | G_IO_ERR;
g_source_add_poll ( (GSource *) source, &source->fd_x11 );
main_loop = g_main_loop_new ( NULL, FALSE );
g_source_attach ( (GSource *) source, NULL );
// Setup signal handling sources.
GSource *sigs_hup = NULL, *sigs_term = NULL, *sigs_usr1 = NULL;
// SIGHup signal.
sigs_hup = g_unix_signal_source_new ( SIGHUP );
g_source_set_callback ( sigs_hup, main_loop_signal_handler_hup, NULL, NULL );
g_source_attach ( sigs_hup, NULL );
// SIGTERM
sigs_term = g_unix_signal_source_new ( SIGTERM );
g_source_set_callback ( sigs_term, main_loop_signal_handler_term, NULL, NULL );
g_source_attach ( sigs_term, NULL );
// SIGUSR1
sigs_usr1 = g_unix_signal_source_new ( SIGUSR1 );
g_source_set_callback ( sigs_usr1, main_loop_signal_handler_usr1, NULL, NULL );
g_source_attach ( sigs_usr1, NULL );
// Start mainloop.
g_main_loop_run ( main_loop );
// Cleanup
g_source_unref ( (GSource *) source );
g_source_unref ( sigs_hup );
g_source_unref ( sigs_term );
g_source_unref ( sigs_usr1 );
g_main_loop_unref ( main_loop );
release_global_keybindings ();
// Join the signal process thread. (at this point it should have exited).
// this also unrefs (de-allocs) the GThread object.
g_thread_join ( pid_signal_proc );
// Close pipe
close ( pfds[0] );
close ( pfds[1] );
if ( !quiet ) {
fprintf ( stdout, "Quit from daemon mode.\n" );
}