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75 lines
1.4 KiB
75 lines
1.4 KiB
#ifndef SFRT_SOFTINT_H
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#define SFRT_SOFTINT_H
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#include <stdbool.h>
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#include <assert.h>
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#include <signal.h>
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static inline int
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softint_mask(int signal)
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{
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sigset_t set;
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int return_code;
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assert(signal == SIGALRM || signal == SIGUSR1);
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/* all threads created by the calling thread will have signal blocked */
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sigemptyset(&set);
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sigaddset(&set, signal);
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return_code = pthread_sigmask(SIG_BLOCK, &set, NULL);
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if (return_code != 0) {
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errno = return_code;
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perror("pthread_sigmask");
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exit(-1);
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}
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return 0;
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}
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static inline int
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softint_unmask(int signal)
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{
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sigset_t set;
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int return_code;
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assert(signal == SIGALRM || signal == SIGUSR1);
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/* all threads created by the calling thread will have signal unblocked */
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sigemptyset(&set);
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sigaddset(&set, signal);
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return_code = pthread_sigmask(SIG_UNBLOCK, &set, NULL);
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if (return_code != 0) {
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errno = return_code;
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perror("pthread_sigmask");
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exit(-1);
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}
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return 0;
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}
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extern __thread volatile sig_atomic_t softint_off;
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static inline void
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softint_disable(void)
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{
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while (__sync_bool_compare_and_swap(&softint_off, 0, 1) == false)
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;
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}
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static inline void
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softint_enable(void)
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{
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if (__sync_bool_compare_and_swap(&softint_off, 1, 0) == false) assert(0);
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}
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static inline int
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softint_enabled(void)
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{
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return (softint_off == 0);
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}
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void softint_init(void);
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void softint_timer_arm(void);
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void softint_timer_disarm(void);
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#endif /* SFRT_SOFTINT_H */
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