missing files

svn path=/trunk/; revision=1329

2 files changed, 653 insertions, 0 deletions

diff --git a/camel/camel-thread-proxy.c b/camel/camel-thread-proxy.c
new file mode 100644
index 0000000000..277893ede8
--- /dev/null
+++ b/camel/camel-thread-proxy.c
@@ -0,0 +1,566 @@
+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
+/* camel-folder-pt-proxy.c : proxy folder using posix threads */
+
+/* 
+ *
+ * Copyright (C) 1999 Bertrand Guiheneuf <Bertrand.Guiheneuf@aful.org> .
+ *
+ * This program is free software; you can redistribute it and/or 
+ * modify it under the terms of the GNU General Public License as 
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
+ * USA
+ */
+
+
+
+#include <config.h>
+#include "camel-log.h"
+#include "camel-marshal-utils.h"
+#include "camel-thread-proxy.h"
+#include <pthread.h>
+#include <unistd.h>
+#include <string.h>
+#include <errno.h>
+
+
+
+/* vocabulary: 
+ *  operation: commanded by the main thread, executed by the child thread
+ *  callback: commanded by the child thread, generally when an operation is 
+ *    completed. Executed in the main thread, 
+ */
+
+/* needed for proper casts of async funcs when 
+ * calling pthreads_create
+ */
+typedef void * (*thread_call_func) (void *);
+
+/* forward declarations */
+static gboolean  
+_thread_notification_catch (GIOChannel *source,
+			    GIOCondition condition,
+			    gpointer data);
+
+static void
+_notify_availability (CamelThreadProxy *proxy, gchar op_name);
+
+static int
+_init_notify_system (CamelThreadProxy *proxy);
+
+
+
+/**
+ * camel_thread_proxy_new: create a new proxy object
+ *  
+ * Create a new proxy object. This proxy object can be used 
+ * to run async operations and this operations can trigger 
+ * callbacks. It can also be used to proxy signals.
+ * 
+ * Return value: The newly created proxy object
+ **/
+CamelThreadProxy *
+camel_thread_proxy_new ()
+{
+	CamelThreadProxy *proxy;
+	
+	CAMEL_LOG_FULL_DEBUG ("Entering CamelThreadProxy::new\n");
+
+	proxy = g_new (CamelThreadProxy, 1);
+	if (!proxy)
+		return NULL;
+
+	proxy->server_op_queue = camel_op_queue_new ();
+	proxy->client_op_queue = camel_op_queue_new ();
+	proxy->signal_data_cond = g_cond_new();
+	proxy->signal_data_mutex = g_mutex_new();
+	if (_init_notify_system (proxy) < 0) {
+		g_free (proxy);
+		return NULL;
+	}
+	CAMEL_LOG_FULL_DEBUG ("Leaving CamelThreadProxy::new\n");
+	return proxy;
+}
+
+
+/**
+ * camel_thread_proxy_free: free a proxy object
+ * @proxy: proxy object to free
+ * 
+ * free a proxy object
+ **/
+void 
+camel_thread_proxy_free (CamelThreadProxy *proxy)
+{
+	CAMEL_LOG_FULL_DEBUG ("Entering CamelThreadProxy::free\n");
+	
+	g_cond_free (proxy->signal_data_cond);
+	g_mutex_free (proxy->signal_data_mutex);
+	camel_op_queue_free (proxy->server_op_queue);
+	camel_op_queue_free (proxy->client_op_queue);
+
+	CAMEL_LOG_FULL_DEBUG ("Leaving CamelThreadProxy::free\n");
+}
+
+
+
+
+
+/* Operations handling */
+
+
+/**
+ * _op_run_free_notify:
+ * @folder: folder to notify when the operation is completed. 
+ * @op: operation to run. 
+ * 
+ * run an operation, free the operation field
+ * and then notify the main thread of the op
+ * completion.
+ * 
+ * this routine is intended to be called 
+ * in a new thread (in _run_next_op_in_thread)
+ * 
+ **/
+void
+_op_run_free_and_notify (CamelOp *op)
+{
+	gboolean error;
+	CamelThreadProxy *th_proxy;
+	
+	CAMEL_LOG_FULL_DEBUG ("Entering CamelThreadProxy::_op_run_free_and_notify\n");
+
+	camel_op_run (op);
+	camel_op_free (op);
+	th_proxy = camel_op_get_user_data (op);
+	_notify_availability (th_proxy, 'a');
+
+	CAMEL_LOG_FULL_DEBUG ("Leaving CamelThreadProxy::_op_run_free_and_notify\n");
+}
+
+
+/**
+ * _run_next_op_in_thread:  
+ * @proxy_object: 
+ * 
+ * run the next operation pending in the proxy 
+ * operation queue
+ **/
+static void 
+_run_next_op_in_thread (CamelThreadProxy *proxy)
+{
+	CamelOp *op;
+	CamelOpQueue *server_op_queue;
+	CamelThreadProxy *th_proxy;
+	pthread_t thread;
+
+	CAMEL_LOG_FULL_DEBUG ("Entering CamelThreadProxy::_run_next_op_in_thread\n");
+
+	server_op_queue = proxy->server_op_queue;
+	/* get the next pending operation */
+	op = camel_op_queue_pop_op (server_op_queue);
+	if (!op) {
+		camel_op_queue_set_service_availability (server_op_queue, TRUE);
+		return;
+	}
+	
+	/* run the operation in a child thread */
+	pthread_create (&thread, NULL, (thread_call_func) _op_run_free_and_notify, op);
+
+	CAMEL_LOG_FULL_DEBUG ("Leaving CamelThreadProxy::_run_next_op_in_thread\n");
+}
+
+
+
+/**
+ * camel_thread_proxy_push_op: push an operation in the proxy operation queue
+ * @proxy: proxy object 
+ * @op: operation to push in the execution queue
+ * 
+ * if no thread is currently running, executes the 
+ * operation directly, otherwise push the operation 
+ * in the proxy operation queue.
+ **/
+void 
+camel_thread_proxy_push_op (CamelThreadProxy *proxy, CamelOp *op)
+{
+	CamelOpQueue *server_op_queue;
+	
+	CAMEL_LOG_FULL_DEBUG ("Entering CamelThreadProxy::camel_thread_proxy_push_op\n");
+
+	g_assert (proxy);
+	server_op_queue = proxy->server_op_queue;
+	
+	/* put the proxy object in the user data
+	   so that it can be notified when the 
+	   operation is completed */
+	camel_op_set_user_data (op, (gpointer)proxy);
+	
+	/* get next operation */
+	camel_op_queue_push_op (server_op_queue, op);
+	
+	if (camel_op_queue_get_service_availability (server_op_queue)) {
+		/* no thread is currently running, run 
+		 * the next operation. */
+		camel_op_queue_set_service_availability (server_op_queue, FALSE);
+		/* when the operation is completed in the 
+		   child thread the main thread gets 
+		   notified and executes next operation 
+		   (see _thread_notification_catch, case 'a')
+		   so there is no need to set the service
+		   availability to FALSE except here 
+		*/
+		_run_next_op_in_thread (proxy);		
+	}
+	CAMEL_LOG_FULL_DEBUG ("Leaving CamelThreadProxy::camel_thread_proxy_push_op\n");
+}
+/**
+ * _op_run_and_free: Run an operation and free it
+ * @op: Operation object
+ * 
+ * Run an operation object in the current thread 
+ * and free it.
+ **/
+static void
+_op_run_and_free (CamelOp *op)
+{
+	CAMEL_LOG_FULL_DEBUG ("Entering CamelThreadProxy::_op_run_and_free\n");
+	camel_op_run (op);
+	camel_op_free (op);
+	CAMEL_LOG_FULL_DEBUG ("Leaving CamelThreadProxy::_op_run_and_free\n");
+}
+
+
+
+
+
+
+/* Callbacks handling */
+
+/**
+ * _run_next_cb: Run next callback pending in a proxy object 
+ * @proxy: Proxy object 
+ * 
+ * Run next callback in the callback queue of a proxy object 
+ **/
+static void 
+_run_next_cb (CamelThreadProxy *proxy)
+{
+	CamelOp *op;
+	CamelOpQueue *client_op_queue;
+	CamelThreadProxy *th_proxy;
+
+	CAMEL_LOG_FULL_DEBUG ("Entering CamelThreadProxy::_run_next_cb\n");
+	client_op_queue = proxy->client_op_queue;
+
+	/* get the next pending operation */
+	op = camel_op_queue_pop_op (client_op_queue);
+	if (!op) return;
+	
+	/* run the operation in the main thread */
+	_op_run_and_free (op);
+
+	CAMEL_LOG_FULL_DEBUG ("Leaving CamelThreadProxy::_run_next_cb\n");
+}
+
+
+/**
+ * camel_thread_proxy_push_cb: push a callback in the client queue
+ * @proxy: proxy object concerned by the callback
+ * @cb: callback to push
+ * 
+ * Push an operation in the client queue, ie the queue 
+ * containing the operations (callbacks) intended to be
+ * executed in the main thread.
+ **/
+void 
+camel_thread_proxy_push_cb (CamelThreadProxy *proxy, CamelOp *cb)
+{
+	CamelOpQueue *client_op_queue;
+	
+	CAMEL_LOG_FULL_DEBUG ("Entering CamelThreadProxy::camel_thread_proxy_push_cb\n");
+	client_op_queue = proxy->client_op_queue;
+
+	/* put the proxy object in the user data
+	   so that it can be notified when the 
+	   operation is completed */
+	camel_op_set_user_data (cb, (gpointer)proxy);
+	
+	/* push the callback in the client queue */
+	camel_op_queue_push_op (client_op_queue, cb);
+	
+	/* tell the main thread a new callback is there */
+	_notify_availability (proxy, 'c');
+	
+	CAMEL_LOG_FULL_DEBUG ("Leaving CamelThreadProxy::camel_thread_proxy_push_cb\n");
+}  
+
+
+
+/**
+ * _init_notify_system: set the notify channel up
+ * @proxy: proxy object 
+ * 
+ * called once to set the notification channel up
+ **/
+static int
+_init_notify_system (CamelThreadProxy *proxy)
+{
+	int filedes[2];
+
+	CAMEL_LOG_FULL_DEBUG ("Entering CamelThreadProxy::_init_notify_system\n");
+
+	/* set up the notification channel */
+	if (pipe (filedes) < 0) {
+		CAMEL_LOG_WARNING ("could not create pipe in CamelThreadProxy::_init_notify_system\n");
+		CAMEL_LOG_FULL_DEBUG ("Full error message : %s\n", strerror(errno));
+		return -1;
+	}
+	
+	
+	proxy->pipe_client_fd = filedes [0];
+	proxy->pipe_server_fd = filedes [1];
+	proxy->notify_source =  g_io_channel_unix_new (filedes [0]);
+	proxy->notify_channel =  g_io_channel_unix_new (filedes [1]);
+	
+	/* the _thread_notification_catch function 
+	* will be called in the main thread when the 
+	* child thread writes some data in the channel */ 
+	g_io_add_watch (proxy->notify_source, G_IO_IN,
+			_thread_notification_catch, 
+			proxy);
+	
+	CAMEL_LOG_FULL_DEBUG ("Leaving CamelThreadProxy::_init_notify_system\n");
+	return 1;
+}
+
+/**
+ * _notify_availability: notify the main thread from an event
+ * @proxy: proxy object
+ * @op_name: operation name
+ *
+ * called by child thread  to notify the main 
+ * thread  something is available for him.
+ * What this thing is depends on  @op_name:
+ *
+ * 'a' : thread available. That means the thread is ready 
+ *       to process an operation. 
+ * 's' : a signal is available. Used by the signal proxy.
+ *
+ */
+static void
+_notify_availability (CamelThreadProxy *proxy, gchar op_name)
+{
+	GIOChannel *notification_channel;
+	guint bytes_written;
+
+	CAMEL_LOG_FULL_DEBUG ("Entering CamelThreadProxy::_notify_availability\n");
+
+	notification_channel = proxy->notify_channel;	
+
+	do {
+		/* the write operation will trigger the
+		 * watch on the main thread side */
+		g_io_channel_write  (notification_channel,
+				     &op_name,
+				     1,
+				     &bytes_written);	
+	} while (bytes_written < 1);
+
+	CAMEL_LOG_FULL_DEBUG ("Leaving CamelThreadProxy::_notify_availability\n");
+}
+
+
+
+/* signal proxying */
+
+
+
+/**
+ * _signal_marshaller_server_side: called in the child thread to proxy a signal    
+ * @object: 
+ * @data: 
+ * @n_args: 
+ * @args: 
+ * 
+ * 
+ **/
+static void
+_signal_marshaller_server_side (GtkObject *object,
+				gpointer data,
+				guint n_args,
+				GtkArg *args)
+{
+	CamelThreadProxy *proxy;
+	guint signal_id;
+	
+	CAMEL_LOG_FULL_DEBUG ("Entering CamelThreadProxy::_signal_marshaller_server_side\n");
+	proxy = CAMEL_THREAD_PROXY (gtk_object_get_data (object, "__proxy__"));
+	signal_id = (guint)data;
+	g_assert (proxy);
+
+	g_mutex_lock (proxy->signal_data_mutex);
+	
+	/* we are going to wait for the main client thread 
+	 * to have emitted the last signal we asked him
+	 * to proxy.
+	 */
+	while (proxy->signal_data.args)
+		g_cond_wait (proxy->signal_data_cond,
+			     proxy->signal_data_mutex);
+
+	proxy->signal_data.signal_id = signal_id;
+	proxy->signal_data.args = args;
+
+	
+	g_mutex_unlock (proxy->signal_data_mutex);
+
+	/* tell the main thread there is a signal pending */
+	_notify_availability (proxy, 's');
+
+	CAMEL_LOG_FULL_DEBUG ("Leaving CamelThreadProxy::_signal_marshaller_server_side\n");
+}
+
+
+static void
+_signal_marshaller_client_side (CamelThreadProxy *proxy)
+{
+	g_mutex_lock (proxy->signal_data_mutex);
+	g_assert (proxy->signal_data.args);
+	
+	CAMEL_LOG_FULL_DEBUG ("Entering CamelThreadProxy::_signal_marshaller_client_side\n");
+	/* emit the pending signal */
+	gtk_signal_emitv (GTK_OBJECT (proxy), 
+			  proxy->signal_data.signal_id,
+			  proxy->signal_data.args);
+
+	proxy->signal_data.args = NULL;
+
+	/* if waiting for the signal to be treated,
+	 * awake the client thread up 
+	 */ 
+	g_cond_signal (proxy->signal_data_cond);
+	g_mutex_unlock (proxy->signal_data_mutex);	
+	CAMEL_LOG_FULL_DEBUG ("Leaving CamelThreadProxy::_signal_marshaller_client_side\n");
+}
+
+
+/**
+ * camel_thread_proxy_add_signals: init the signal proxy
+ * @proxy: proxy 
+ * @proxy_object: Proxy Gtk Object 
+ * @real_object: Real Gtk Object 
+ * @signal_to_proxy: NULL terminated array of signal name 
+ * 
+ * Add some signals to the list of signals to be 
+ * proxied by the proxy object.
+ * The signals emitted by the real object in the child
+ * thread are reemited by the proxy object in the 
+ * main thread.
+ **/
+void 
+camel_thread_proxy_add_signals (CamelThreadProxy *proxy, 
+				GtkObject *proxy_object,
+				GtkObject *real_object,
+				char *signal_to_proxy[])
+{
+	GtkType camel_folder_type;
+	guint i;
+ 
+	CAMEL_LOG_FULL_DEBUG ("Entering CamelThreadProxy::camel_thread_proxy_init_signals\n");
+
+	for (i=0; signal_to_proxy[i]; i++) {
+		/* connect the signal to the signal marshaller
+		 * user_data is the signal id */
+		gtk_signal_connect_full (GTK_OBJECT (real_object),
+					 signal_to_proxy[i],
+					 NULL,
+					 _signal_marshaller_server_side,
+					 (gpointer)gtk_signal_lookup (signal_to_proxy[i], 
+								      GTK_OBJECT_CLASS (real_object)->type),
+					 NULL,
+					 TRUE,
+					 FALSE);
+	}
+	
+		
+	CAMEL_LOG_FULL_DEBUG ("Leaving CamelThreadProxy::camel_thread_proxy_init_signals\n");
+	
+	
+}
+
+/****   catch notification from child thread ****/
+/**
+ * _thread_notification_catch: call by glib loop when data is available on the thread io channel
+ * @source: 
+ * @condition: 
+ * @data: 
+ * 
+ * called by watch set on the IO channel
+ * 
+ * Return value: TRUE because we don't want the watch to be removed
+ **/
+static gboolean  
+_thread_notification_catch (GIOChannel *source,
+			    GIOCondition condition,
+			    gpointer data)
+{
+	CamelThreadProxy *proxy = CAMEL_THREAD_PROXY (data);	
+	gchar op_name;
+	guint bytes_read;
+	GIOError error;
+
+	CAMEL_LOG_FULL_DEBUG ("Entering CamelThreadProxy::_thread_notification_catch\n");
+
+
+	error = g_io_channel_read (source,
+				   &op_name,
+				   1,
+				   &bytes_read);
+	
+	while ((!error) && (bytes_read == 1)) {
+		
+		switch (op_name) { 		
+		case 'a': /* the thread is OK for a new operation */
+			_run_next_op_in_thread (proxy);		
+			break;
+		case 's': /* there is a pending signal to proxy */
+			_signal_marshaller_client_side (proxy);
+			break;
+		case 'c': /* there is a cb pending in the main thread */
+			_run_next_cb (proxy);
+			break;
+		}
+		
+		error = g_io_channel_read (source,
+					   &op_name,
+					   1,
+					   &bytes_read);
+
+	}
+
+	CAMEL_LOG_FULL_DEBUG ("Leaving CamelThreadProxy::_thread_notification_catch\n");
+
+	/* do not remove the io watch */
+	return TRUE;
+}
+
+
+
+
+
+
+
+
+
+
+
diff --git a/camel/camel-thread-proxy.h b/camel/camel-thread-proxy.h
new file mode 100644
index 0000000000..efd06f5945
--- /dev/null
+++ b/camel/camel-thread-proxy.h
@@ -0,0 +1,87 @@
+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
+/* camel-folder-pt-proxy.h : proxy folder using posix threads */
+
+/* 
+ *
+ * Copyright (C) 1999 Bertrand Guiheneuf <Bertrand.Guiheneuf@aful.org> .
+ *
+ * This program is free software; you can redistribute it and/or 
+ * modify it under the terms of the GNU General Public License as 
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
+ * USA
+ */
+
+
+
+
+
+#ifndef CAMEL_THREAD_PROXY_H
+#define CAMEL_THREAD_PROXY_H 1
+
+#ifdef __cplusplus
+extern "C" {
+#pragma }
+#endif /* __cplusplus }*/
+
+#include "camel-op-queue.h"
+
+#define CAMEL_THREAD_PROXY(o)  (CamelThreadProxy *)(o)
+
+
+typedef struct {
+	guint signal_id;
+	GtkArg *args;
+} CamelThreadProxySignalData;
+
+
+typedef struct {
+
+	GtkObject *real_object;
+	GtkObject *proxy_object;
+	
+	CamelOpQueue *server_op_queue;
+	CamelOpQueue *client_op_queue;
+
+  
+	gint pipe_client_fd;
+	gint pipe_server_fd;
+	GIOChannel *notify_source;
+	GIOChannel *notify_channel;
+
+	/* signal proxy */
+	GMutex *signal_data_mutex;
+	GCond *signal_data_cond;
+	CamelThreadProxySignalData signal_data;
+
+} CamelThreadProxy;
+
+
+CamelThreadProxy *camel_thread_proxy_new ();
+void camel_thread_proxy_free (CamelThreadProxy *proxy);
+
+void camel_thread_proxy_push_op (CamelThreadProxy *proxy, CamelOp *op);
+void camel_thread_proxy_push_cb (CamelThreadProxy *proxy, CamelOp *cb);
+
+void camel_thread_proxy_add_signals (CamelThreadProxy *proxy, 
+				     GtkObject *proxy_object,
+				     GtkObject *real_object,
+				     char *signal_to_proxy[]);
+
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+
+#endif /* CAMEL_THREAD_PROXY_H */
+
+