/* +----------------------------------------------------------------------+ | 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: | | https://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> | +----------------------------------------------------------------------+ */ #ifndef ZEND_SIGNAL_H #define ZEND_SIGNAL_H #ifdef ZEND_SIGNALS #include <signal.h> #include "zend_portability.h" #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 */ bool check; /* check for replaced handlers on shutdown */ 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_FAST(zend_signal_globals_offset, zend_signal_globals_t *, v) BEGIN_EXTERN_C() ZEND_API extern int zend_signal_globals_id; ZEND_API extern size_t zend_signal_globals_offset; 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 void zend_signal(int signo, void (*handler)(int)); ZEND_API void 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 */