1 #include <sys/eventfd.h>
2 #include <unistd.h>
3 #include <errno.h>
4 #include "syscall.h"
5
eventfd(unsigned int count,int flags)6 int eventfd(unsigned int count, int flags)
7 {
8 int r = __syscall(SYS_eventfd2, count, flags);
9 #ifdef SYS_eventfd
10 if (r==-ENOSYS && !flags) r = __syscall(SYS_eventfd, count);
11 #endif
12 return __syscall_ret(r);
13 }
14
eventfd_read(int fd,eventfd_t * value)15 int eventfd_read(int fd, eventfd_t *value)
16 {
17 return (sizeof(*value) == read(fd, value, sizeof(*value))) ? 0 : -1;
18 }
19
eventfd_write(int fd,eventfd_t value)20 int eventfd_write(int fd, eventfd_t value)
21 {
22 return (sizeof(value) == write(fd, &value, sizeof(value))) ? 0 : -1;
23 }
24