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/* Copyright 2013-2024
* Kaz Kylheku <kaz@kylheku.com>
* Vancouver, Canada
* All rights reserved.
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#if HAVE_POSIX_SIGS
typedef struct {
unsigned int set;
} small_sigset_t;
extern small_sigset_t sig_blocked_cache;
#define sig_save_enable \
do { \
int sig_save = async_sig_enabled; \
if (!sig_save) \
sig_check(); \
async_sig_enabled = 1; \
{ \
do { } while (0)
#define sig_restore_enable \
} \
async_sig_enabled = sig_save; \
} while(0)
#define sig_save_disable \
do { \
int sig_save = async_sig_enabled; \
async_sig_enabled = 0; \
{ \
do { } while (0)
#define sig_restore_disable \
} \
async_sig_enabled = sig_save; \
if (sig_save) \
sig_check(); \
} while(0)
val sig_check(void);
INLINE val sig_check_fast(void)
{
extern volatile unsigned long sig_deferred;
return if2(sig_deferred, sig_check());
}
extern volatile sig_atomic_t async_sig_enabled;
#else
#define sig_save_enable do { do ; while (0)
#define sig_save_disable do { do ; while (0)
#define sig_restore_enable } while (0)
#define sig_restore_disable } while (0)
#define sig_check_fast() ((void) 0)
extern int async_sig_enabled;
#endif
void sig_init(void);
val set_sig_handler(val signo, val lambda);
val get_sig_handler(val signo);
#if HAVE_POSIX_SIGS
int sig_mask(int how, const small_sigset_t *set, small_sigset_t *oldset);
#endif
#if HAVE_ITIMER
val getitimer_wrap(val which);
val setitimer_wrap(val which, val interval, val currval);
#endif
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