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/* Copyright 2013-2014
* Kaz Kylheku <kaz@kylheku.com>
* Vancouver, Canada
* All rights reserved.
*
* BSD License:
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 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.
* 3. The name of the author may not be used to endorse or promote
* products derived from this software without specific prior
* written permission.
*
* 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.
*/
#if HAVE_POSIX_SIGS
#define sig_save_enable \
do { \
int sig_save = async_sig_enabled; \
async_sig_enabled = 1; \
if (!sig_save) \
sig_check(); \
{ \
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;
int rv;
} extended_jmp_buf;
#define extended_setjmp(EJB) \
(sigsetjmp((EJB).jb, 1) \
? (async_sig_enabled = (EJB).se, (EJB).rv) \
: ((EJB).se = async_sig_enabled, 0))
#define extended_longjmp(EJB, ARG) \
((EJB).rv = (ARG), longjmp((EJB).jb, 1))
#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)
tyedef jmp_buf extended_jmp_buf;
#define extended_setjmp(EJB) setjmp(EJB)
#define extended_longjmp(EJB, ARG) longjmp(EJB, ARG)
#endif
extern volatile sig_atomic_t async_sig_enabled;
void sig_init(void);
val set_sig_handler(val signo, val lambda);
val get_sig_handler(val signo);
val sig_check(void);
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