1 /* 2 +----------------------------------------------------------------------+ 3 | Zend Signal Handling | 4 +----------------------------------------------------------------------+ 5 | Copyright (c) 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 #ifndef ZEND_SIGNAL_H 22 #define ZEND_SIGNAL_H 23 24 #ifdef ZEND_SIGNALS 25 26 #include <signal.h> 27 28 #ifndef NSIG 29 #define NSIG 65 30 #endif 31 32 #ifndef ZEND_SIGNAL_QUEUE_SIZE 33 #define ZEND_SIGNAL_QUEUE_SIZE 64 34 #endif 35 36 /* Signal structs */ 37 typedef struct _zend_signal_entry_t { 38 int flags; /* sigaction style flags */ 39 void* handler; /* signal handler or context */ 40 } zend_signal_entry_t; 41 42 typedef struct _zend_signal_t { 43 int signo; 44 siginfo_t *siginfo; 45 void* context; 46 } zend_signal_t; 47 48 typedef struct _zend_signal_queue_t { 49 zend_signal_t zend_signal; 50 struct _zend_signal_queue_t *next; 51 } zend_signal_queue_t; 52 53 /* Signal Globals */ 54 typedef struct _zend_signal_globals_t { 55 int depth; 56 int blocked; /* 1==TRUE, 0==FALSE */ 57 int running; /* in signal handler execution */ 58 int active; /* internal signal handling is enabled */ 59 zend_bool check; /* check for replaced handlers on shutdown */ 60 zend_bool reset; /* reset signal handlers on each request */ 61 zend_signal_entry_t handlers[NSIG]; 62 zend_signal_queue_t pstorage[ZEND_SIGNAL_QUEUE_SIZE], *phead, *ptail, *pavail; /* pending queue */ 63 } zend_signal_globals_t; 64 65 # ifdef ZTS 66 # define SIGG(v) ZEND_TSRMG_FAST(zend_signal_globals_offset, zend_signal_globals_t *, v) 67 BEGIN_EXTERN_C() 68 ZEND_API extern int zend_signal_globals_id; 69 ZEND_API extern size_t zend_signal_globals_offset; 70 END_EXTERN_C() 71 # else 72 # define SIGG(v) (zend_signal_globals.v) 73 BEGIN_EXTERN_C() 74 ZEND_API extern zend_signal_globals_t zend_signal_globals; 75 END_EXTERN_C() 76 # endif /* not ZTS */ 77 78 # ifdef ZTS 79 # define ZEND_SIGNAL_BLOCK_INTERRUPTIONS() if (EXPECTED(zend_signal_globals_id)) { SIGG(depth)++; } 80 # define ZEND_SIGNAL_UNBLOCK_INTERRUPTIONS() if (EXPECTED(zend_signal_globals_id) && UNEXPECTED(((SIGG(depth)--) == SIGG(blocked)))) { zend_signal_handler_unblock(); } 81 # else /* ZTS */ 82 # define ZEND_SIGNAL_BLOCK_INTERRUPTIONS() SIGG(depth)++; 83 # define ZEND_SIGNAL_UNBLOCK_INTERRUPTIONS() if (((SIGG(depth)--) == SIGG(blocked))) { zend_signal_handler_unblock(); } 84 # endif /* not ZTS */ 85 86 ZEND_API void zend_signal_handler_unblock(void); 87 void zend_signal_activate(void); 88 void zend_signal_deactivate(void); 89 BEGIN_EXTERN_C() 90 ZEND_API void zend_signal_startup(void); 91 END_EXTERN_C() 92 void zend_signal_init(void); 93 94 ZEND_API int zend_signal(int signo, void (*handler)(int)); 95 ZEND_API int zend_sigaction(int signo, const struct sigaction *act, struct sigaction *oldact); 96 97 #else /* ZEND_SIGNALS */ 98 99 # define ZEND_SIGNAL_BLOCK_INTERRUPTIONS() 100 # define ZEND_SIGNAL_UNBLOCK_INTERRUPTIONS() 101 102 # define zend_signal_activate() 103 # define zend_signal_deactivate() 104 # define zend_signal_startup() 105 # define zend_signal_init() 106 107 # define zend_signal(signo, handler) signal(signo, handler) 108 # define zend_sigaction(signo, act, oldact) sigaction(signo, act, oldact) 109 110 #endif /* ZEND_SIGNALS */ 111 112 #endif /* ZEND_SIGNAL_H */ 113
