49 lines
1.2 KiB
C
49 lines
1.2 KiB
C
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// Zak's kqueue implementation
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#ifndef SYS_EVENT_H
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#define SYS_EVENT_H
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#include <stdint.h>
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// The kevent structure is used for waiting/receiving notifications.
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struct kevent {
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uintptr_t ident;
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int16_t filter;
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uint16_t flags;
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uint32_t fflags;
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int64_t data;
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void* udata;
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uint64_t ext[4];
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};
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// kqueue1 is the kqueue system call with a flags argument,
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// as defined on NetBSD & OpenBSD.
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int kqueue1(int flags);
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// kqueue() without flags is equivalent to kqueue1(0)
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#define kqueue() kqueue1(0)
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// On FreeBSD, kqueue1 is also known as kqueuex
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#define kqueuex(flags) kqueue1(flags)
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// After creating a kqueue, kevent is the main syscall used.
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// This accepts a list of changes and can receive multiple events.
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int kevent(int queue, const struct kevent* changes, int nch, struct kevent* events, int nev, void* todo_timeout);
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// The EV_SET() macro is for initialising a struct kevent*
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#define EV_SET(ev,idn,flt,flg,ffl,dat,udt) \
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do { \
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(ev)->ident = idn; \
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(ev)->filter = flt; \
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(ev)->flags = flg; \
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(ev)->fflags = ffl; \
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(ev)->data = dat; \
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(ev)->udata = udt; \
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(ev)->ext[0] = 0; \
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(ev)->ext[1] = 0; \
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(ev)->ext[2] = 0; \
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(ev)->ext[3] = 0; \
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} while(0)
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// From ifndef at top of file:
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#endif
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