Permalink
Newer
Older
100644 109 lines (92 sloc) 3.99 KB
Ilia Alshanetsky
Jun 22, 2011
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); }
Ilia Alshanetsky
Jun 22, 2011
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); }
Ilia Alshanetsky
Jun 22, 2011
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();
Ilia Alshanetsky
Jun 22, 2011
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
*/