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863ae1143f
Add fdm_signal_add() and fdm_signal_del(). Signals added to the fdm will be monitored, and the provided callback called as “soon as possible” from the main context (i.e not from the signal handler context). Monitored signals are *blocked* by default. We use epoll_pwait() to unblock them while we’re polling. This allows us to do race-free signal detection. We use a single handler for all monitored signals; the handler simply updates the signal’s slot in a global array (sized to fit SIGRTMAX signals). When epoll_pwait() returns EINTR, we loop the global array. The callback associated with each signal that fired is called.
34 lines
1.1 KiB
C
34 lines
1.1 KiB
C
#pragma once
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#include <stdbool.h>
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struct fdm;
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typedef bool (*fdm_fd_handler_t)(struct fdm *fdm, int fd, int events, void *data);
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typedef bool (*fdm_signal_handler_t)(struct fdm *fdm, int signo, void *data);
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typedef void (*fdm_hook_t)(struct fdm *fdm, void *data);
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enum fdm_hook_priority {
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FDM_HOOK_PRIORITY_LOW,
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FDM_HOOK_PRIORITY_NORMAL,
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FDM_HOOK_PRIORITY_HIGH
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};
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struct fdm *fdm_init(void);
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void fdm_destroy(struct fdm *fdm);
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bool fdm_add(struct fdm *fdm, int fd, int events, fdm_fd_handler_t handler, void *data);
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bool fdm_del(struct fdm *fdm, int fd);
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bool fdm_del_no_close(struct fdm *fdm, int fd);
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bool fdm_event_add(struct fdm *fdm, int fd, int events);
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bool fdm_event_del(struct fdm *fdm, int fd, int events);
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bool fdm_hook_add(struct fdm *fdm, fdm_hook_t hook, void *data,
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enum fdm_hook_priority priority);
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bool fdm_hook_del(struct fdm *fdm, fdm_hook_t hook, enum fdm_hook_priority priority);
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bool fdm_signal_add(struct fdm *fdm, int signo, fdm_signal_handler_t handler, void *data);
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bool fdm_signal_del(struct fdm *fdm, int signo);
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bool fdm_poll(struct fdm *fdm);
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