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zend_signal.h
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/*
+----------------------------------------------------------------------+
| Zend Signal Handling |
+----------------------------------------------------------------------+
| Copyright (c) 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 |
| [email protected] so we can mail you a copy immediately. |
+----------------------------------------------------------------------+
| Authors: Lucas Nealan <[email protected]> |
| Arnaud Le Blanc <[email protected]> |
+----------------------------------------------------------------------+
*/
#ifndef ZEND_SIGNAL_H
#define ZEND_SIGNAL_H
#ifdef ZEND_SIGNALS
# ifdef HAVE_SIGNAL_H
# include <signal.h>
# endif
#ifndef NSIG
#define NSIG 65
#endif
#ifndef ZEND_SIGNAL_QUEUE_SIZE
#define ZEND_SIGNAL_QUEUE_SIZE 64
#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; /* 1==TRUE, 0==FALSE */
int running; /* in signal handler execution */
int active; /* internal signal handling is enabled */
zend_bool check; /* check for replaced handlers on shutdown */
zend_bool reset; /* reset signal handlers on each request */
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) ZEND_TSRMG(zend_signal_globals_id, zend_signal_globals_t *, v)
BEGIN_EXTERN_C()
ZEND_API extern int zend_signal_globals_id;
END_EXTERN_C()
# else
# define SIGG(v) (zend_signal_globals.v)
BEGIN_EXTERN_C()
ZEND_API extern zend_signal_globals_t zend_signal_globals;
END_EXTERN_C()
# endif /* not ZTS */
# ifdef ZTS
# define ZEND_SIGNAL_BLOCK_INTERRUPTIONS() 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(); }
# else /* ZTS */
# define ZEND_SIGNAL_BLOCK_INTERRUPTIONS() SIGG(depth)++;
# define ZEND_SIGNAL_UNBLOCK_INTERRUPTIONS() if (((SIGG(depth)--) == SIGG(blocked))) { zend_signal_handler_unblock(); }
# endif /* not ZTS */
ZEND_API void zend_signal_handler_unblock(void);
void zend_signal_activate(void);
void zend_signal_deactivate(void);
BEGIN_EXTERN_C()
ZEND_API void zend_signal_startup(void);
END_EXTERN_C()
void zend_signal_init(void);
ZEND_API int zend_signal(int signo, void (*handler)(int));
ZEND_API int zend_sigaction(int signo, const struct sigaction *act, struct sigaction *oldact);
#else /* ZEND_SIGNALS */
# define ZEND_SIGNAL_BLOCK_INTERRUPTIONS()
# define ZEND_SIGNAL_UNBLOCK_INTERRUPTIONS()
# define zend_signal_activate()
# define zend_signal_deactivate()
# define zend_signal_startup()
# define zend_signal_init()
# define zend_signal(signo, handler) signal(signo, handler)
# define zend_sigaction(signo, act, oldact) sigaction(signo, act, oldact)
#endif /* ZEND_SIGNALS */
#endif /* ZEND_SIGNAL_H */