74 lines
1.6 KiB
Go
74 lines
1.6 KiB
Go
// +build linux,arm64
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package sys
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// #include <sys/epoll.h>
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/*
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int EpollCreate1(int flag) {
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return epoll_create1(flag);
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}
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int EpollCtl(int efd, int op,int sfd, int events, int fd) {
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struct epoll_event event;
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event.events = events;
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event.data.fd = fd;
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return epoll_ctl(efd, op, sfd, &event);
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}
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struct event_t {
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uint32_t events;
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int fd;
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};
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struct epoll_event events[128];
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int run_epoll_wait(int fd, struct event_t *event) {
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int n, i;
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n = epoll_wait(fd, events, 128, -1);
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for (i = 0; i < n; i++) {
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event[i].events = events[i].events;
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event[i].fd = events[i].data.fd;
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}
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return n;
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}
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*/
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import "C"
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import (
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"fmt"
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"syscall"
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"unsafe"
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)
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// EpollCreate1 calls a C implementation
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func EpollCreate1(flag int) (int, error) {
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fd := int(C.EpollCreate1(C.int(flag)))
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if fd < 0 {
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return fd, fmt.Errorf("failed to create epoll, errno is %d", fd)
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}
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return fd, nil
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}
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// EpollCtl calls a C implementation
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func EpollCtl(epfd int, op int, fd int, event *syscall.EpollEvent) error {
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errno := C.EpollCtl(C.int(epfd), C.int(syscall.EPOLL_CTL_ADD), C.int(fd), C.int(event.Events), C.int(event.Fd))
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if errno < 0 {
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return fmt.Errorf("Failed to ctl epoll")
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}
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return nil
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}
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// EpollWait calls a C implementation
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func EpollWait(epfd int, events []syscall.EpollEvent, msec int) (int, error) {
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var c_events [128]C.struct_event_t
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n := int(C.run_epoll_wait(C.int(epfd), (*C.struct_event_t)(unsafe.Pointer(&c_events))))
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if n < 0 {
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return int(n), fmt.Errorf("Failed to wait epoll")
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}
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for i := 0; i < n; i++ {
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events[i].Fd = int32(c_events[i].fd)
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events[i].Events = uint32(c_events[i].events)
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}
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return int(n), nil
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}
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