167 lines
3.8 KiB
C
167 lines
3.8 KiB
C
/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
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/*
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* Author :
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* Bertrand Guiheneuf <bertrand@helixcode.com>
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*
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* Copyright 1999, 2000 Helix Code, Inc. (http://www.helixcode.com)
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of the
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* License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
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* USA
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*/
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/* MT safe */
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#include <config.h>
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#include "camel-op-queue.h"
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static GStaticMutex op_queue_mutex = G_STATIC_MUTEX_INIT;
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/**
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* camel_op_queue_new: create a new operation queue
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*
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* Create a new operation queue.
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*
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* Return value: the newly allcated object
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**/
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CamelOpQueue *
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camel_op_queue_new ()
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{
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CamelOpQueue *op_queue;
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op_queue = g_new (CamelOpQueue, 1);
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op_queue->ops_tail = NULL;
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op_queue->ops_head = NULL;
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op_queue->service_available = TRUE;
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return op_queue;
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}
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void
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camel_op_queue_free (CamelOpQueue *op_queue)
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{
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g_list_free (op_queue->ops_head);
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g_free (op_queue);
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}
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/**
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* camel_op_queue_push_op: Add an operation to the queue
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* @queue: queue object
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* @op: operation to add
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*
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* Add an operation to an operation queue.
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* The queue is a FIFO queue.
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**/
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void
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camel_op_queue_push_op (CamelOpQueue *queue, CamelOp *op)
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{
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g_assert (queue);
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g_static_mutex_lock (&op_queue_mutex);
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if (!queue->ops_tail) {
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queue->ops_head = g_list_prepend (NULL, op);
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queue->ops_tail = queue->ops_head;
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} else
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queue->ops_head = g_list_prepend (queue->ops_head, op);
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g_static_mutex_unlock (&op_queue_mutex);
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}
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/**
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* camel_op_queue_pop_op: Pop the next operation pending in the queue
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* @queue: queue object
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*
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* Pop the next operation pending in the queue.
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*
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* Return value:
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**/
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CamelOp *
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camel_op_queue_pop_op (CamelOpQueue *queue)
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{
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GList *op_list;
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CamelOp *op;
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g_assert (queue);
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g_static_mutex_lock (&op_queue_mutex);
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op_list = queue->ops_tail;
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if (!op_list) return NULL;
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queue->ops_tail = queue->ops_tail->prev;
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op = (CamelOp *)op_list->data;
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g_static_mutex_unlock (&op_queue_mutex);
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return op;
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}
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/**
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* camel_op_queue_run_next_op: run the next pending operation
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* @queue: queue object
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*
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* Run the next pending operation in the queue.
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*
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* Return value: TRUE if an operation was launched FALSE if there was no operation pending in the queue.
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**/
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gboolean
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camel_op_queue_run_next_op (CamelOpQueue *queue)
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{
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CamelOp *op;
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op = camel_op_queue_pop_op (queue);
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if (!op) return FALSE;
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return FALSE;
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}
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/**
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* camel_op_queue_set_service_availability: set the service availability for an operation queue
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* @queue: queue object
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* @available: availability flag
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*
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* set the service availability
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**/
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void
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camel_op_queue_set_service_availability (CamelOpQueue *queue, gboolean available)
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{
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g_static_mutex_lock (&op_queue_mutex);
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queue->service_available = available;
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g_static_mutex_unlock (&op_queue_mutex);
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}
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/**
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* camel_op_queue_get_service_availability: determine if an operation queue service is available
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* @queue: queue object
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*
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* Determine if the service associated to an operation queue is available.
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*
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* Return value: service availability.
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**/
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gboolean
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camel_op_queue_get_service_availability (CamelOpQueue *queue)
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{
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gboolean available;
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g_static_mutex_lock (&op_queue_mutex);
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available = queue->service_available;
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g_static_mutex_unlock (&op_queue_mutex);
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return available;
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}
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