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/*
* e-operation-pool.c
*
* Copyright (C) 2011 Novell, Inc. (www.novell.com)
*
* This library is free software: you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation.
*
* This library 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 Lesser General Public License
* for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this library. If not, see <http://www.gnu.org/licenses/>.
*
*/
#include "e-operation-pool.h"
struct _EOperationPool {
GThreadPool *pool;
GMutex ops_lock;
GHashTable *ops;
guint32 last_opid;
};
/**
* e_operation_pool_new: (skip)
* @max_threads: Maximum number of threads for this pool
* @thread_func: Function to run for a given thread
* @user_data: The user data to pass to @thread_func
*
* Returns: (transfer full): a new #EOperationPool with the given settings.
* Free it with e_operation_pool_free(), when no longer needed.
*
* Since: 3.2
**/
EOperationPool *
e_operation_pool_new (guint max_threads,
GFunc thread_func,
gpointer user_data)
{
EOperationPool *pool;
GThreadPool *thread_pool;
GError *error = NULL;
g_return_val_if_fail (thread_func != NULL, NULL);
thread_pool = g_thread_pool_new (thread_func, user_data, max_threads, FALSE, &error);
if (error) {
g_warning ("%s: Failed to create thread pool: %s", G_STRFUNC, error->message);
g_error_free (error);
return NULL;
}
pool = g_slice_new0 (EOperationPool);
pool->pool = thread_pool;
g_mutex_init (&pool->ops_lock);
pool->ops = g_hash_table_new (g_direct_hash, g_direct_equal);
pool->last_opid = 0;
/* Kill threads which don't do anything for 10 seconds */
g_thread_pool_set_max_idle_time (10 * 1000);
return pool;
}
/**
* e_operation_pool_free:
* @pool: an #EOperationPool
*
* Frees previously created @pool.
*
* Since: 3.2
**/
void
e_operation_pool_free (EOperationPool *pool)
{
g_return_if_fail (pool != NULL);
g_thread_pool_free (pool->pool, FALSE, FALSE);
g_mutex_clear (&pool->ops_lock);
g_hash_table_destroy (pool->ops);
g_slice_free (EOperationPool, pool);
}
/**
* e_operation_pool_reserve_opid:
* @pool: an #EOperationPool
*
* Reserves new operation ID, which is returned. This operation ID may
* be released by e_operation_pool_release_opid() when the operation
* is finished.
*
* Returns: a new operation ID
*
* Since: 3.2
**/
guint32
e_operation_pool_reserve_opid (EOperationPool *pool)
{
guint32 opid;
g_return_val_if_fail (pool != NULL, 0);
g_return_val_if_fail (pool->ops != NULL, 0);
g_mutex_lock (&pool->ops_lock);
pool->last_opid++;
if (!pool->last_opid)
pool->last_opid = 1;
while (pool->last_opid && g_hash_table_lookup (pool->ops, GUINT_TO_POINTER (pool->last_opid)))
pool->last_opid++;
opid = pool->last_opid;
if (opid)
g_hash_table_insert (pool->ops, GUINT_TO_POINTER (opid), GUINT_TO_POINTER (1));
g_mutex_unlock (&pool->ops_lock);
g_return_val_if_fail (opid != 0, 0);
return opid;
}
/**
* e_operation_pool_release_opid:
* @pool: an #EOperationPool
* @opid: an operation ID
*
* Releases @opid previously reserved by e_operation_pool_reserve_opid().
*
* Since: 3.2
**/
void
e_operation_pool_release_opid (EOperationPool *pool,
guint32 opid)
{
g_return_if_fail (pool != NULL);
g_return_if_fail (pool->ops != NULL);
g_mutex_lock (&pool->ops_lock);
g_hash_table_remove (pool->ops, GUINT_TO_POINTER (opid));
g_mutex_unlock (&pool->ops_lock);
}
/**
* e_operation_pool_push:
* @pool: an #EOperationPool
* @opdata: user data for the operation
*
* Pushes an operation to be processed. @opdata is passed to the function
* provided in e_operation_pool_new().
*
* Since: 3.2
**/
void
e_operation_pool_push (EOperationPool *pool,
gpointer opdata)
{
GError *error = NULL;
g_return_if_fail (pool != NULL);
g_return_if_fail (pool->pool != NULL);
g_thread_pool_push (pool->pool, opdata, &error);
if (error) {
g_warning ("%s: Failed to push to thread pool: %s", G_STRFUNC, error->message);
g_error_free (error);
}
}
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