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zend_signal.h
/* +----------------------------------------------------------------------+ | 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 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_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() # 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(); } #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 (((SIGG(depth)--) == SIGG(blocked))) { zend_signal_handler_unblock(); } #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(void); void zend_signal_deactivate(void); void zend_signal_startup(); void zend_signal_init(); void zend_signal_shutdown(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); #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: */
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