1 /* 2 +----------------------------------------------------------------------+ 3 | Zend Signal Handling | 4 +----------------------------------------------------------------------+ 5 | Copyright (c) 2008-2018 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 ZEND_SIGNALS 27 28 # ifdef HAVE_SIGNAL_H 29 # include <signal.h> 30 # endif 31 32 #ifndef NSIG 33 #define NSIG 65 34 #endif 35 36 #ifndef ZEND_SIGNAL_QUEUE_SIZE 37 #define ZEND_SIGNAL_QUEUE_SIZE 64 38 #endif 39 40 /* Signal structs */ 41 typedef struct _zend_signal_entry_t { 42 int flags; /* sigaction style flags */ 43 void* handler; /* signal handler or context */ 44 } zend_signal_entry_t; 45 46 typedef struct _zend_signal_t { 47 int signo; 48 siginfo_t *siginfo; 49 void* context; 50 } zend_signal_t; 51 52 typedef struct _zend_signal_queue_t { 53 zend_signal_t zend_signal; 54 struct _zend_signal_queue_t *next; 55 } zend_signal_queue_t; 56 57 /* Signal Globals */ 58 typedef struct _zend_signal_globals_t { 59 int depth; 60 int blocked; /* 1==TRUE, 0==FALSE */ 61 int running; /* in signal handler execution */ 62 int active; /* internal signal handling is enabled */ 63 zend_bool check; /* check for replaced handlers on shutdown */ 64 zend_signal_entry_t handlers[NSIG]; 65 zend_signal_queue_t pstorage[ZEND_SIGNAL_QUEUE_SIZE], *phead, *ptail, *pavail; /* pending queue */ 66 } zend_signal_globals_t; 67 68 # ifdef ZTS 69 # define SIGG(v) ZEND_TSRMG(zend_signal_globals_id, zend_signal_globals_t *, v) 70 BEGIN_EXTERN_C() 71 ZEND_API extern int zend_signal_globals_id; 72 END_EXTERN_C() 73 # else 74 # define SIGG(v) (zend_signal_globals.v) 75 BEGIN_EXTERN_C() 76 ZEND_API extern zend_signal_globals_t zend_signal_globals; 77 END_EXTERN_C() 78 # endif /* not ZTS */ 79 80 # ifdef ZTS 81 # define ZEND_SIGNAL_BLOCK_INTERRUPTIONS() if (EXPECTED(zend_signal_globals_id)) { SIGG(depth)++; } 82 # define ZEND_SIGNAL_UNBLOCK_INTERRUPTIONS() if (EXPECTED(zend_signal_globals_id) && UNEXPECTED(((SIGG(depth)--) == SIGG(blocked)))) { zend_signal_handler_unblock(); } 83 # else /* ZTS */ 84 # define ZEND_SIGNAL_BLOCK_INTERRUPTIONS() SIGG(depth)++; 85 # define ZEND_SIGNAL_UNBLOCK_INTERRUPTIONS() if (((SIGG(depth)--) == SIGG(blocked))) { zend_signal_handler_unblock(); } 86 # endif /* not ZTS */ 87 88 ZEND_API void zend_signal_handler_unblock(void); 89 void zend_signal_activate(void); 90 void zend_signal_deactivate(void); 91 BEGIN_EXTERN_C() 92 ZEND_API void zend_signal_startup(void); 93 END_EXTERN_C() 94 void zend_signal_init(void); 95 96 ZEND_API int zend_signal(int signo, void (*handler)(int)); 97 ZEND_API int zend_sigaction(int signo, const struct sigaction *act, struct sigaction *oldact); 98 99 #else /* ZEND_SIGNALS */ 100 101 # define ZEND_SIGNAL_BLOCK_INTERRUPTIONS() 102 # define ZEND_SIGNAL_UNBLOCK_INTERRUPTIONS() 103 104 # define zend_signal_activate() 105 # define zend_signal_deactivate() 106 # define zend_signal_startup() 107 # define zend_signal_init() 108 109 # define zend_signal(signo, handler) signal(signo, handler) 110 # define zend_sigaction(signo, act, oldact) sigaction(signo, act, oldact) 111 112 #endif /* ZEND_SIGNALS */ 113 114 #endif /* ZEND_SIGNAL_H */ 115 116 /* 117 * Local variables: 118 * tab-width: 4 119 * c-basic-offset: 4 120 * indent-tabs-mode: t 121 * End: 122 */ 123
