containerd/sys/epoll_arm64.go

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