1 /* 2 +----------------------------------------------------------------------+ 3 | Zend Signal Handling | 4 +----------------------------------------------------------------------+ 5 | Copyright (c) 2008 The PHP Group | 6 +----------------------------------------------------------------------+ 7 | This source file is subject to version 3.01 of the PHP license, | 8 | that is bundled with this package in the file LICENSE, and is | 9 | available through the world-wide-web at the following url: | 10 | http://www.php.net/license/3_01.txt | 11 | If you did not receive a copy of the PHP license and are unable to | 12 | obtain it through the world-wide-web, please send a note to | 13 | license@php.net so we can mail you a copy immediately. | 14 +----------------------------------------------------------------------+ 15 | Authors: Lucas Nealan <lucas@php.net> | 16 | Arnaud Le Blanc <lbarnaud@php.net> | 17 +----------------------------------------------------------------------+ 18 19 */ 20 21 /* $Id$ */ 22 23 #ifndef ZEND_SIGNAL_H 24 #define ZEND_SIGNAL_H 25 26 #ifdef HAVE_SIGNAL_H 27 #include <signal.h> 28 #endif 29 30 #ifndef NSIG 31 #define NSIG 65 32 #endif 33 34 #ifndef ZEND_SIGNAL_QUEUE_SIZE 35 #define ZEND_SIGNAL_QUEUE_SIZE 32 36 #endif 37 38 /* Signal structs */ 39 typedef struct _zend_signal_entry_t { 40 int flags; /* sigaction style flags */ 41 void* handler; /* signal handler or context */ 42 } zend_signal_entry_t; 43 44 typedef struct _zend_signal_t { 45 int signo; 46 siginfo_t *siginfo; 47 void* context; 48 } zend_signal_t; 49 50 typedef struct _zend_signal_queue_t { 51 zend_signal_t zend_signal; 52 struct _zend_signal_queue_t *next; 53 } zend_signal_queue_t; 54 55 /* Signal Globals */ 56 typedef struct _zend_signal_globals_t { 57 int depth; 58 int blocked; /* 0==TRUE, -1==FALSE */ 59 int running; /* in signal handler execution */ 60 int active; /* internal signal handling is enabled */ 61 int initialized; /* memory initialized */ 62 zend_bool check; /* check for replaced handlers on shutdown */ 63 zend_signal_entry_t handlers[NSIG]; 64 zend_signal_queue_t pstorage[ZEND_SIGNAL_QUEUE_SIZE], *phead, *ptail, *pavail; /* pending queue */ 65 } zend_signal_globals_t; 66 67 #ifdef ZTS 68 # define SIGG(v) TSRMG(zend_signal_globals_id, zend_signal_globals_t *, v) 69 BEGIN_EXTERN_C() 70 ZEND_API extern int zend_signal_globals_id; 71 END_EXTERN_C() 72 # define ZEND_SIGNAL_BLOCK_INTERRUPUTIONS() if (EXPECTED(zend_signal_globals_id)) { SIGG(depth)++; } 73 # define ZEND_SIGNAL_UNBLOCK_INTERRUPTIONS() if (EXPECTED(zend_signal_globals_id) && UNEXPECTED((--SIGG(depth))==SIGG(blocked))) { zend_signal_handler_unblock(TSRMLS_C); } 74 #else /* ZTS */ 75 # define SIGG(v) (zend_signal_globals.v) 76 extern ZEND_API zend_signal_globals_t zend_signal_globals; 77 # define ZEND_SIGNAL_BLOCK_INTERRUPUTIONS() SIGG(depth)++; 78 # define ZEND_SIGNAL_UNBLOCK_INTERRUPTIONS() if (UNEXPECTED((--SIGG(depth))==SIGG(blocked))) { zend_signal_handler_unblock(TSRMLS_C); } 79 #endif /* not ZTS */ 80 81 # define SIGNAL_BEGIN_CRITICAL() sigset_t oldmask; \ 82 zend_sigprocmask(SIG_BLOCK, &global_sigmask, &oldmask); 83 # define SIGNAL_END_CRITICAL() zend_sigprocmask(SIG_SETMASK, &oldmask, NULL); 84 85 void zend_signal_handler_defer(int signo, siginfo_t *siginfo, void *context); 86 ZEND_API void zend_signal_handler_unblock(); 87 void zend_signal_activate(TSRMLS_D); 88 void zend_signal_deactivate(TSRMLS_D); 89 void zend_signal_startup(); 90 void zend_signal_shutdown(TSRMLS_D); 91 ZEND_API int zend_signal(int signo, void (*handler)(int) TSRMLS_DC); 92 ZEND_API int zend_sigaction(int signo, const struct sigaction *act, struct sigaction *oldact TSRMLS_DC); 93 94 #ifdef ZTS 95 #define zend_sigprocmask(signo, set, oldset) tsrm_sigmask((signo), (set), (oldset)) 96 #else 97 #define zend_sigprocmask(signo, set, oldset) sigprocmask((signo), (set), (oldset)) 98 #endif 99 100 #endif /* ZEND_SIGNAL_H */ 101 102 /* 103 * Local variables: 104 * tab-width: 4 105 * c-basic-offset: 4 106 * indent-tabs-mode: t 107 * End: 108 */ 109
