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/*
+----------------------------------------------------------------------+
| Zend Signal Handling |
+----------------------------------------------------------------------+
| Copyright (c) 2008 The PHP Group |
+----------------------------------------------------------------------+
| This source file is subject to version 3.01 of the PHP license, |
| that is bundled with this package in the file LICENSE, and is |
| available through the world-wide-web at the following url: |
| http://www.php.net/license/3_01.txt |
| If you did not receive a copy of the PHP license and are unable to |
| obtain it through the world-wide-web, please send a note to |
| license@php.net so we can mail you a copy immediately. |
+----------------------------------------------------------------------+
| Authors: Lucas Nealan <lucas@php.net> |
| Arnaud Le Blanc <lbarnaud@php.net> |
+----------------------------------------------------------------------+
*/
/* $Id$ */
#ifndef ZEND_SIGNAL_H
#define ZEND_SIGNAL_H
#ifdef HAVE_SIGNAL_H
#include <signal.h>
#endif
#ifndef NSIG
#define NSIG 65
#endif
#ifndef ZEND_SIGNAL_QUEUE_SIZE
#define ZEND_SIGNAL_QUEUE_SIZE 32
#endif
/* Signal structs */
typedef struct _zend_signal_entry_t {
int flags; /* sigaction style flags */
void* handler; /* signal handler or context */
} zend_signal_entry_t;
typedef struct _zend_signal_t {
int signo;
siginfo_t *siginfo;
void* context;
} zend_signal_t;
typedef struct _zend_signal_queue_t {
zend_signal_t zend_signal;
struct _zend_signal_queue_t *next;
} zend_signal_queue_t;
/* Signal Globals */
typedef struct _zend_signal_globals_t {
int depth;
int blocked; /* 0==TRUE, -1==FALSE */
int running; /* in signal handler execution */
int active; /* internal signal handling is enabled */
int initialized; /* memory initialized */
zend_bool check; /* check for replaced handlers on shutdown */
zend_signal_entry_t handlers[NSIG];
zend_signal_queue_t pstorage[ZEND_SIGNAL_QUEUE_SIZE], *phead, *ptail, *pavail; /* pending queue */
} zend_signal_globals_t;
#ifdef ZTS
# define SIGG(v) TSRMG(zend_signal_globals_id, zend_signal_globals_t *, v)
BEGIN_EXTERN_C()
ZEND_API extern int zend_signal_globals_id;
END_EXTERN_C()
# define ZEND_SIGNAL_BLOCK_INTERRUPUTIONS() if (EXPECTED(zend_signal_globals_id)) { SIGG(depth)++; }
# define ZEND_SIGNAL_UNBLOCK_INTERRUPTIONS() if (EXPECTED(zend_signal_globals_id) && UNEXPECTED((--SIGG(depth))==SIGG(blocked))) { zend_signal_handler_unblock(TSRMLS_C); }
#else /* ZTS */
# define SIGG(v) (zend_signal_globals.v)
extern ZEND_API zend_signal_globals_t zend_signal_globals;
# define ZEND_SIGNAL_BLOCK_INTERRUPUTIONS() SIGG(depth)++;
# define ZEND_SIGNAL_UNBLOCK_INTERRUPTIONS() if (UNEXPECTED((--SIGG(depth))==SIGG(blocked))) { zend_signal_handler_unblock(TSRMLS_C); }
#endif /* not ZTS */
# define SIGNAL_BEGIN_CRITICAL() sigset_t oldmask; \
zend_sigprocmask(SIG_BLOCK, &global_sigmask, &oldmask);
# define SIGNAL_END_CRITICAL() zend_sigprocmask(SIG_SETMASK, &oldmask, NULL);
void zend_signal_handler_defer(int signo, siginfo_t *siginfo, void *context);
ZEND_API void zend_signal_handler_unblock();
void zend_signal_activate(TSRMLS_D);
void zend_signal_deactivate(TSRMLS_D);
void zend_signal_startup();
void zend_signal_shutdown(TSRMLS_D);
ZEND_API int zend_signal(int signo, void (*handler)(int) TSRMLS_DC);
ZEND_API int zend_sigaction(int signo, const struct sigaction *act, struct sigaction *oldact TSRMLS_DC);
#ifdef ZTS
#define zend_sigprocmask(signo, set, oldset) tsrm_sigmask((signo), (set), (oldset))
#else
#define zend_sigprocmask(signo, set, oldset) sigprocmask((signo), (set), (oldset))
#endif
#endif /* ZEND_SIGNAL_H */
/*
* Local variables:
* tab-width: 4
* c-basic-offset: 4
* indent-tabs-mode: t
* End:
*/