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-rw-r--r--eglib/gmain.c238
1 files changed, 191 insertions, 47 deletions
diff --git a/eglib/gmain.c b/eglib/gmain.c
index 182f5efa..dfe56fcd 100644
--- a/eglib/gmain.c
+++ b/eglib/gmain.c
@@ -9,6 +9,9 @@
#include <limits.h>
#include <sys/time.h>
#include <time.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+#include <fcntl.h>
#include <gmain.h>
@@ -27,6 +30,13 @@ struct _GIOChannel {
gboolean close_on_unref;
};
+struct child_watch {
+ guint id;
+ GPid pid;
+ GChildWatchFunc function;
+ gpointer user_data;
+};
+
struct _GMainContext {
guint next_id;
glong next_timeout;
@@ -35,9 +45,13 @@ struct _GMainContext {
GSList *proc_timeouts;
gboolean timeout_lock;
- GSList *watches;
- GSList *proc_watches;
- gboolean watch_lock;
+ GSList *io_watches;
+ GSList *proc_io_watches;
+ gboolean io_lock;
+
+ GSList *child_watches;
+ GSList *proc_child_watches;
+ gboolean child_lock;
};
struct _GMainLoop {
@@ -175,7 +189,7 @@ gint g_io_channel_unix_get_fd(GIOChannel *channel)
return channel->fd;
}
-struct watch {
+struct io_watch {
guint id;
GIOChannel *channel;
gint priority;
@@ -188,7 +202,7 @@ struct watch {
static GMainContext *default_context = NULL;
-static void watch_free(struct watch *watch)
+static void watch_free(struct io_watch *watch)
{
if (watch->destroy)
watch->destroy(watch->user_data);
@@ -212,27 +226,27 @@ static GMainContext *g_main_context_default()
static gboolean g_io_remove_watch(GMainContext *context, guint id)
{
GSList *l;
- struct watch *w;
+ struct io_watch *w;
- for (l = context->watches; l != NULL; l = l->next) {
+ for (l = context->io_watches; l != NULL; l = l->next) {
w = l->data;
if (w->id != id)
continue;
- context->watches = g_slist_remove(context->watches, w);
+ context->io_watches = g_slist_remove(context->io_watches, w);
watch_free(w);
return TRUE;
}
- for (l = context->proc_watches; l != NULL; l = l->next) {
+ for (l = context->proc_io_watches; l != NULL; l = l->next) {
w = l->data;
if (w->id != id)
continue;
- context->proc_watches = g_slist_remove(context->proc_watches, w);
+ context->proc_io_watches = g_slist_remove(context->proc_io_watches, w);
watch_free(w);
return TRUE;
@@ -279,20 +293,7 @@ static gboolean g_timeout_remove(GMainContext *context, const guint id)
return FALSE;
}
-gboolean g_source_remove(guint tag)
-{
- GMainContext *context = g_main_context_default();
-
- if (g_io_remove_watch(context, tag))
- return TRUE;
-
- if (g_timeout_remove(context, tag))
- return TRUE;
-
- return FALSE;
-}
-
-int watch_prio_cmp(struct watch *w1, struct watch *w2)
+int watch_prio_cmp(struct io_watch *w1, struct io_watch *w2)
{
return w1->priority - w2->priority;
}
@@ -303,10 +304,10 @@ guint g_io_add_watch_full(GIOChannel *channel, gint priority,
GIOCondition condition, GIOFunc func,
gpointer user_data, GDestroyNotify notify)
{
- struct watch *watch;
+ struct io_watch *watch;
GMainContext *context = g_main_context_default();
- watch = g_new(struct watch, 1);
+ watch = g_new(struct io_watch, 1);
watch->id = context->next_id++;
watch->channel = g_io_channel_ref(channel);
@@ -316,10 +317,10 @@ guint g_io_add_watch_full(GIOChannel *channel, gint priority,
watch->user_data = user_data;
watch->destroy = notify;
- if (context->watch_lock)
- context->proc_watches = watch_list_add(context->proc_watches, watch);
+ if (context->io_lock)
+ context->proc_io_watches = watch_list_add(context->proc_io_watches, watch);
else
- context->watches = watch_list_add(context->watches, watch);
+ context->io_watches = watch_list_add(context->io_watches, watch);
return watch->id;
}
@@ -440,9 +441,9 @@ void g_main_loop_run(GMainLoop *loop)
while (loop->is_running) {
int nfds;
GSList *l;
- struct watch *w;
+ struct io_watch *w;
- for (nfds = 0, l = context->watches; l != NULL; l = l->next, nfds++) {
+ for (nfds = 0, l = context->io_watches; l != NULL; l = l->next, nfds++) {
w = l->data;
ufds[nfds].fd = w->channel->fd;
ufds[nfds].events = w->condition;
@@ -456,16 +457,16 @@ void g_main_loop_run(GMainLoop *loop)
if (poll(ufds, nfds, context->next_timeout) < 0)
continue;
- context->watch_lock = TRUE;
+ context->io_lock = TRUE;
- while (context->watches) {
+ while (context->io_watches) {
gboolean ret;
- w = context->watches->data;
+ w = context->io_watches->data;
if (!*w->revents) {
- context->watches = g_slist_remove(context->watches, w);
- context->proc_watches = watch_list_add(context->proc_watches, w);
+ context->io_watches = g_slist_remove(context->io_watches, w);
+ context->proc_io_watches = watch_list_add(context->proc_io_watches, w);
continue;
}
@@ -473,22 +474,22 @@ void g_main_loop_run(GMainLoop *loop)
/* Check if the watch was removed/freed by the callback
* function */
- if (!g_slist_find_custom(context->watches, w, ptr_cmp))
+ if (!g_slist_find_custom(context->io_watches, w, ptr_cmp))
continue;
- context->watches = g_slist_remove(context->watches, w);
+ context->io_watches = g_slist_remove(context->io_watches, w);
if (!ret) {
watch_free(w);
continue;
}
- context->proc_watches = watch_list_add(context->proc_watches, w);
+ context->proc_io_watches = watch_list_add(context->proc_io_watches, w);
}
- context->watches = context->proc_watches;
- context->proc_watches = NULL;
- context->watch_lock = FALSE;
+ context->io_watches = context->proc_io_watches;
+ context->proc_io_watches = NULL;
+ context->io_lock = FALSE;
/* check expired timers */
timeout_handlers_check(loop->context);
@@ -507,8 +508,8 @@ void g_main_loop_unref(GMainLoop *loop)
if (!loop->context)
return;
- g_slist_foreach(loop->context->watches, (GFunc)watch_free, NULL);
- g_slist_free(loop->context->watches);
+ g_slist_foreach(loop->context->io_watches, (GFunc)watch_free, NULL);
+ g_slist_free(loop->context->io_watches);
g_slist_foreach(loop->context->timeouts, (GFunc)g_free, NULL);
g_slist_free(loop->context->timeouts);
@@ -564,6 +565,112 @@ void g_error_free(GError *err)
/* Spawning related functions */
+static int child_watch_pipe[2] = { -1, -1 };
+
+static void sigchld_handler(int signal)
+{
+ int ret;
+ ret = write(child_watch_pipe[1], "B", 1);
+}
+
+static gboolean child_watch_remove(GMainContext *context, guint id)
+{
+ GSList *l;
+ struct child_watch *w;
+
+ for (l = context->child_watches; l != NULL; l = l->next) {
+ w = l->data;
+
+ if (w->id != id)
+ continue;
+
+ context->child_watches =
+ g_slist_remove(context->child_watches, w);
+ g_free(w);
+
+ return TRUE;
+ }
+
+ for (l = context->proc_child_watches; l != NULL; l = l->next) {
+ w = l->data;
+
+ if (w->id != id)
+ continue;
+
+ context->proc_child_watches =
+ g_slist_remove(context->proc_child_watches, w);
+ g_free(w);
+
+ return TRUE;
+ }
+
+
+ return FALSE;
+}
+
+gboolean child_watch(GIOChannel *io, GIOCondition cond, gpointer user_data)
+{
+ int ret;
+ char b[20];
+ GMainContext *context = g_main_context_default();
+
+ ret = read(child_watch_pipe[0], b, 20);
+
+ context->child_lock = TRUE;
+
+ while (context->child_watches) {
+ gint status;
+ struct child_watch *w = context->child_watches->data;
+
+ if (waitpid(w->pid, &status, WNOHANG) <= 0) {
+ context->child_watches =
+ g_slist_remove(context->child_watches, w);
+ context->proc_child_watches =
+ watch_list_add(context->proc_child_watches, w);
+ continue;
+ }
+
+ w->function(w->pid, status, w->user_data);
+
+ /* Check if the callback already removed us */
+ if (!g_slist_find(context->child_watches, w))
+ continue;
+
+ context->child_watches = g_slist_remove(context->child_watches, w);
+ g_free(w);
+ }
+
+ context->child_watches = context->proc_child_watches;
+ context->proc_child_watches = NULL;
+ context->child_lock = FALSE;
+
+ return TRUE;
+}
+
+static void init_child_pipe(void)
+{
+ struct sigaction action;
+ GIOChannel *io;
+
+ if (pipe(child_watch_pipe) < 0) {
+ fprintf(stderr, "Unable to initialize child watch pipe: %s (%d)\n",
+ strerror(errno), errno);
+ abort();
+ }
+
+ fcntl(child_watch_pipe[1], F_SETFL,
+ O_NONBLOCK | fcntl(child_watch_pipe[1], F_GETFL));
+
+ action.sa_handler = sigchld_handler;
+ sigemptyset(&action.sa_mask);
+ action.sa_flags = SA_NOCLDSTOP;
+ sigaction(SIGCHLD, &action, NULL);
+
+ io = g_io_channel_unix_new(child_watch_pipe[0]);
+ g_io_add_watch(io, G_IO_IN, child_watch, NULL);
+ g_io_channel_unref(io);
+}
+
gboolean g_spawn_async(const gchar *working_directory,
gchar **argv, gchar **envp,
GSpawnFlags flags,
@@ -572,7 +679,9 @@ gboolean g_spawn_async(const gchar *working_directory,
GPid *child_pid,
GError **error)
{
- /* Not implemented */
+ if (child_watch_pipe[0] < 0)
+ init_child_pipe();
+
return FALSE;
}
@@ -583,8 +692,43 @@ void g_spawn_close_pid(GPid pid)
guint g_child_watch_add(GPid pid, GChildWatchFunc func, gpointer user_data)
{
- /* Not implemented */
- return 0;
+ struct child_watch *w;
+ GMainContext *context = g_main_context_default();
+
+ if (child_watch_pipe[0] < 0)
+ init_child_pipe();
+
+ w = g_new(struct child_watch, 1);
+
+ w->id = context->next_id++;
+ w->pid = pid;
+ w->function = func;
+ w->user_data = user_data;
+
+ if (context->child_lock)
+ context->proc_child_watches =
+ watch_list_add(context->proc_child_watches, w);
+ else
+ context->child_watches =
+ watch_list_add(context->child_watches, w);
+
+ return w->id;
+}
+
+gboolean g_source_remove(guint tag)
+{
+ GMainContext *context = g_main_context_default();
+
+ if (g_io_remove_watch(context, tag))
+ return TRUE;
+
+ if (g_timeout_remove(context, tag))
+ return TRUE;
+
+ if (child_watch_remove(context, tag))
+ return TRUE;
+
+ return FALSE;
}
/* UTF-8 Validation: approximate copy/paste from glib2. */