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/* Copyright 2013-2014
* Kaz Kylheku <kaz@kylheku.com>
* Vancouver, Canada
* All rights reserved.
*
* Redistribution of this software in source and binary forms, with or without
* modification, is permitted provided that the following two conditions are met.
*
* Use of this software in any manner constitutes agreement with the disclaimer
* which follows the two conditions.
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL THE
* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DAMAGES, HOWEVER CAUSED,
* AND UNDER ANY THEORY OF LIABILITY, ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#if HAVE_POSIX_SIGS
#define sig_save_enable \
do { \
int sig_save = async_sig_enabled; \
if (!sig_save) \
sig_check(); \
async_sig_enabled = 1; \
{ \
typedef void v_o_i_d
#define sig_restore_enable \
do { } while (0); \
} \
async_sig_enabled = sig_save; \
} while(0)
#define sig_save_disable \
do { \
int sig_save = async_sig_enabled; \
async_sig_enabled = 1; \
{ \
typedef void v_o_i_d
#define sig_restore_disable \
do { } while (0); \
} \
async_sig_enabled = sig_save; \
if (sig_save) \
sig_check(); \
} while(0)
typedef struct {
jmp_buf jb;
sig_atomic_t se;
sigset_t blocked;
val de;
int gc;
int rv;
} extended_jmp_buf;
#define extended_setjmp(EJB) \
(setjmp((EJB).jb) \
? (async_sig_enabled = (EJB).se, \
dyn_env = (EJB).de, \
gc_enabled = ((EJB).gc), \
sig_mask(SIG_SETMASK, &(EJB).blocked, 0), \
(EJB).rv) \
: ((EJB).se = async_sig_enabled, \
(EJB).de = dyn_env, \
(EJB).gc = gc_enabled, \
(EJB).blocked = sig_blocked_cache, 0))
#define extended_longjmp(EJB, ARG) \
((EJB).rv = (ARG), longjmp((EJB).jb, 1))
extern sigset_t sig_blocked_cache;
extern volatile sig_atomic_t async_sig_enabled;
#else
#define sig_save_enable do {
#define sig_save_disable do {
#define sig_restore_enable do { } while (0); } while (0)
#define sig_restore_disable do { } while (0); } while (0)
typedef struct {
jmp_buf jb;
val de;
int gc;
int rv;
} extended_jmp_buf;
#define extended_setjmp(EJB) \
(setjmp((EJB).jb) \
? (dyn_env = (EJB).de, \
gc_enabled = ((EJB).gc), \
(EJB).rv) \
: ((EJB).de = dyn_env, \
(EJB).gc = gc_enabled, \
0))
#define extended_longjmp(EJB, ARG) \
((EJB).rv = (ARG), longjmp((EJB).jb, 1))
extern int async_sig_enabled;
#endif
extern val dyn_env; /* eval.c */
void sig_init(void);
val set_sig_handler(val signo, val lambda);
val get_sig_handler(val signo);
val sig_check(void);
#if HAVE_POSIX_SIGS
int sig_mask(int how, const sigset_t *set, sigset_t *oldset);
#endif
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