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/* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef APR_SIGNAL_H
#define APR_SIGNAL_H
/**
* @file apr_signal.h
* @brief APR Signal Handling
*/
#include "apr.h"
#include "apr_pools.h"
#if APR_HAVE_SIGNAL_H
#include <signal.h>
#endif
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
/**
* @defgroup apr_signal Signal Handling
* @ingroup APR
* @{
*/
#if APR_HAVE_SIGACTION || defined(DOXYGEN)
#if defined(DARWIN) && !defined(__cplusplus) && !defined(_ANSI_SOURCE)
/* work around Darwin header file bugs
* http://www.opensource.apple.com/bugs/X/BSD%20Kernel/2657228.html
*/
#undef SIG_DFL
#undef SIG_IGN
#undef SIG_ERR
#define SIG_DFL (void (*)(int))0
#define SIG_IGN (void (*)(int))1
#define SIG_ERR (void (*)(int))-1
#endif
/** Function prototype for signal handlers */
typedef void apr_sigfunc_t(int);
/**
* Set the signal handler function for a given signal
* @param signo The signal (eg... SIGWINCH)
* @param func the function to get called
*/
APR_DECLARE(apr_sigfunc_t *) apr_signal(int signo, apr_sigfunc_t * func);
#if defined(SIG_IGN) && !defined(SIG_ERR)
#define SIG_ERR ((apr_sigfunc_t *) -1)
#endif
#else /* !APR_HAVE_SIGACTION */
#define apr_signal(a, b) signal(a, b)
#endif
/**
* Get the description for a specific signal number
* @param signum The signal number
* @return The description of the signal
*/
APR_DECLARE(const char *) apr_signal_description_get(int signum);
/**
* APR-private function for initializing the signal package
* @internal
* @param pglobal The internal, global pool
*/
void apr_signal_init(apr_pool_t *pglobal);
/**
* Block the delivery of a particular signal
* @param signum The signal number
* @return status
*/
APR_DECLARE(apr_status_t) apr_signal_block(int signum);
/**
* Enable the delivery of a particular signal
* @param signum The signal number
* @return status
*/
APR_DECLARE(apr_status_t) apr_signal_unblock(int signum);
/** @} */
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* APR_SIGNAL_H */