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The `<signal.h>` header file is part of the standard C89 headers [1] and on current systems can be included unconditionally. Since file requires at least C89 or greater, the `HAVE_SIGNAL_H` symbol defined by Autoconf in Zend.m4 [2] can be ommitted and simplifed. The bundled libmagic (file) also ommits the usage of HAVE_SIGNAL_H since 5.35 however current version in PHP is very modified 5.34 version and will be refactored separately. Check for HAVE_SIGNAL_H is therefore still done in the configure.ac. Refs: [1] https://port70.net/~nsz/c/c89/c89-draft.html#4.1.2 [2] https://git.savannah.gnu.org/cgit/autoconf.git/tree/lib/autoconf/headers.m4
113 lines
4.0 KiB
C
113 lines
4.0 KiB
C
/*
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+----------------------------------------------------------------------+
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| Zend Signal Handling |
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+----------------------------------------------------------------------+
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| Copyright (c) The PHP Group |
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+----------------------------------------------------------------------+
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| This source file is subject to version 3.01 of the PHP license, |
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| that is bundled with this package in the file LICENSE, and is |
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| available through the world-wide-web at the following url: |
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| http://www.php.net/license/3_01.txt |
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| If you did not receive a copy of the PHP license and are unable to |
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| obtain it through the world-wide-web, please send a note to |
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| license@php.net so we can mail you a copy immediately. |
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+----------------------------------------------------------------------+
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| Authors: Lucas Nealan <lucas@php.net> |
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| Arnaud Le Blanc <lbarnaud@php.net> |
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+----------------------------------------------------------------------+
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*/
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#ifndef ZEND_SIGNAL_H
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#define ZEND_SIGNAL_H
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#ifdef ZEND_SIGNALS
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#include <signal.h>
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#ifndef NSIG
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#define NSIG 65
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#endif
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#ifndef ZEND_SIGNAL_QUEUE_SIZE
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#define ZEND_SIGNAL_QUEUE_SIZE 64
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#endif
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/* Signal structs */
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typedef struct _zend_signal_entry_t {
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int flags; /* sigaction style flags */
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void* handler; /* signal handler or context */
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} zend_signal_entry_t;
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typedef struct _zend_signal_t {
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int signo;
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siginfo_t *siginfo;
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void* context;
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} zend_signal_t;
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typedef struct _zend_signal_queue_t {
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zend_signal_t zend_signal;
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struct _zend_signal_queue_t *next;
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} zend_signal_queue_t;
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/* Signal Globals */
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typedef struct _zend_signal_globals_t {
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int depth;
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int blocked; /* 1==TRUE, 0==FALSE */
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int running; /* in signal handler execution */
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int active; /* internal signal handling is enabled */
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zend_bool check; /* check for replaced handlers on shutdown */
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zend_bool reset; /* reset signal handlers on each request */
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zend_signal_entry_t handlers[NSIG];
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zend_signal_queue_t pstorage[ZEND_SIGNAL_QUEUE_SIZE], *phead, *ptail, *pavail; /* pending queue */
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} zend_signal_globals_t;
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# ifdef ZTS
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# define SIGG(v) ZEND_TSRMG_FAST(zend_signal_globals_offset, zend_signal_globals_t *, v)
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BEGIN_EXTERN_C()
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ZEND_API extern int zend_signal_globals_id;
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ZEND_API extern size_t zend_signal_globals_offset;
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END_EXTERN_C()
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# else
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# define SIGG(v) (zend_signal_globals.v)
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BEGIN_EXTERN_C()
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ZEND_API extern zend_signal_globals_t zend_signal_globals;
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END_EXTERN_C()
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# endif /* not ZTS */
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# ifdef ZTS
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# define ZEND_SIGNAL_BLOCK_INTERRUPTIONS() if (EXPECTED(zend_signal_globals_id)) { SIGG(depth)++; }
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# define ZEND_SIGNAL_UNBLOCK_INTERRUPTIONS() if (EXPECTED(zend_signal_globals_id) && UNEXPECTED(((SIGG(depth)--) == SIGG(blocked)))) { zend_signal_handler_unblock(); }
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# else /* ZTS */
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# define ZEND_SIGNAL_BLOCK_INTERRUPTIONS() SIGG(depth)++;
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# define ZEND_SIGNAL_UNBLOCK_INTERRUPTIONS() if (((SIGG(depth)--) == SIGG(blocked))) { zend_signal_handler_unblock(); }
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# endif /* not ZTS */
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ZEND_API void zend_signal_handler_unblock(void);
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void zend_signal_activate(void);
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void zend_signal_deactivate(void);
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BEGIN_EXTERN_C()
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ZEND_API void zend_signal_startup(void);
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END_EXTERN_C()
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void zend_signal_init(void);
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ZEND_API int zend_signal(int signo, void (*handler)(int));
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ZEND_API int zend_sigaction(int signo, const struct sigaction *act, struct sigaction *oldact);
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#else /* ZEND_SIGNALS */
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# define ZEND_SIGNAL_BLOCK_INTERRUPTIONS()
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# define ZEND_SIGNAL_UNBLOCK_INTERRUPTIONS()
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# define zend_signal_activate()
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# define zend_signal_deactivate()
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# define zend_signal_startup()
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# define zend_signal_init()
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# define zend_signal(signo, handler) signal(signo, handler)
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# define zend_sigaction(signo, act, oldact) sigaction(signo, act, oldact)
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#endif /* ZEND_SIGNALS */
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#endif /* ZEND_SIGNAL_H */
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