root/Zend/zend_signal.h

INCLUDED FROM

   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 64
  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;            /* 1==TRUE, 0==FALSE */
  59         int running;            /* in signal handler execution */
  60         int active;             /* internal signal handling is enabled */
  61         zend_bool check;        /* check for replaced handlers on shutdown */
  62         zend_signal_entry_t handlers[NSIG];
  63         zend_signal_queue_t pstorage[ZEND_SIGNAL_QUEUE_SIZE], *phead, *ptail, *pavail; /* pending queue */
  64 } zend_signal_globals_t;
  65 
  66 #ifdef ZTS
  67 # define SIGG(v) ZEND_TSRMG(zend_signal_globals_id, zend_signal_globals_t *, v)
  68 BEGIN_EXTERN_C()
  69 ZEND_API extern int zend_signal_globals_id;
  70 END_EXTERN_C()
  71 # define ZEND_SIGNAL_BLOCK_INTERRUPUTIONS() if (EXPECTED(zend_signal_globals_id)) { SIGG(depth)++; }
  72 # define ZEND_SIGNAL_UNBLOCK_INTERRUPTIONS() if (EXPECTED(zend_signal_globals_id) && UNEXPECTED(((SIGG(depth)--) == SIGG(blocked)))) { zend_signal_handler_unblock(); }
  73 #else /* ZTS */
  74 # define SIGG(v) (zend_signal_globals.v)
  75 extern ZEND_API zend_signal_globals_t zend_signal_globals;
  76 # define ZEND_SIGNAL_BLOCK_INTERRUPUTIONS()  SIGG(depth)++;
  77 # define ZEND_SIGNAL_UNBLOCK_INTERRUPTIONS() if (((SIGG(depth)--) == SIGG(blocked))) { zend_signal_handler_unblock(); }
  78 #endif /* not ZTS */
  79 
  80 # define SIGNAL_BEGIN_CRITICAL()        sigset_t oldmask; \
  81         zend_sigprocmask(SIG_BLOCK, &global_sigmask, &oldmask);
  82 # define SIGNAL_END_CRITICAL()          zend_sigprocmask(SIG_SETMASK, &oldmask, NULL);
  83 
  84 void zend_signal_handler_defer(int signo, siginfo_t *siginfo, void *context);
  85 ZEND_API void zend_signal_handler_unblock();
  86 void zend_signal_activate(void);
  87 void zend_signal_deactivate(void);
  88 void zend_signal_startup();
  89 void zend_signal_init();
  90 void zend_signal_shutdown(void);
  91 ZEND_API int zend_signal(int signo, void (*handler)(int));
  92 ZEND_API int zend_sigaction(int signo, const struct sigaction *act, struct sigaction *oldact);
  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  */