You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
103 lines
2.1 KiB
103 lines
2.1 KiB
#ifndef SFRT_SOFTINT_H
|
|
#define SFRT_SOFTINT_H
|
|
|
|
#include <stdbool.h>
|
|
#include <assert.h>
|
|
#include <signal.h>
|
|
|
|
/***************************************
|
|
* Externs
|
|
***************************************/
|
|
|
|
extern __thread volatile sig_atomic_t softint__is_disabled;
|
|
|
|
/***************************************
|
|
* Public Static Inlines
|
|
***************************************/
|
|
|
|
static inline void
|
|
softint__disable(void)
|
|
{
|
|
while (__sync_bool_compare_and_swap(&softint__is_disabled, 0, 1) == false)
|
|
;
|
|
}
|
|
|
|
|
|
/**
|
|
* Enables signals
|
|
*/
|
|
static inline void
|
|
softint__enable(void)
|
|
{
|
|
if (__sync_bool_compare_and_swap(&softint__is_disabled, 1, 0) == false) assert(0);
|
|
}
|
|
|
|
/**
|
|
* @returns boolean if signals are enabled
|
|
*/
|
|
static inline int
|
|
softint__is_enabled(void)
|
|
{
|
|
return (softint__is_disabled == 0);
|
|
}
|
|
|
|
/**
|
|
* Blocks a signal on the current thread
|
|
* @param signal - the signal you want to block
|
|
* @return 0 on success. Exits program otherwise
|
|
**/
|
|
static inline int
|
|
softint__mask(int signal)
|
|
{
|
|
sigset_t set;
|
|
int return_code;
|
|
|
|
assert(signal == SIGALRM || signal == SIGUSR1);
|
|
/* all threads created by the calling thread will have signal blocked */
|
|
sigemptyset(&set);
|
|
sigaddset(&set, signal);
|
|
return_code = pthread_sigmask(SIG_BLOCK, &set, NULL);
|
|
if (return_code != 0) {
|
|
errno = return_code;
|
|
perror("pthread_sigmask");
|
|
exit(-1);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* Unblocks a signal on the current thread
|
|
* @param signal - the signal you want to block
|
|
* @return 0 on success. Exits program otherwise
|
|
**/
|
|
static inline int
|
|
softint__unmask(int signal)
|
|
{
|
|
sigset_t set;
|
|
int return_code;
|
|
|
|
assert(signal == SIGALRM || signal == SIGUSR1);
|
|
/* all threads created by the calling thread will have signal unblocked */
|
|
sigemptyset(&set);
|
|
sigaddset(&set, signal);
|
|
return_code = pthread_sigmask(SIG_UNBLOCK, &set, NULL);
|
|
if (return_code != 0) {
|
|
errno = return_code;
|
|
perror("pthread_sigmask");
|
|
exit(-1);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/***************************************
|
|
* Exports from module.c
|
|
***************************************/
|
|
|
|
void softint__initialize(void);
|
|
void softint__arm_timer(void);
|
|
void softint__disarm_timer(void);
|
|
|
|
#endif /* SFRT_SOFTINT_H */
|