src/linux/eventfd.c

   1 #include <sys/eventfd.h>
   2 #include <unistd.h>
   3 #include <errno.h>
   4 #include "syscall.h"
   5
   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
  15 int eventfd_read(int fd, eventfd_t *value)
  16 {
  17         return (sizeof(*value) == read(fd, value, sizeof(*value))) ? 0 : -1;
  18 }
  19
  20 int eventfd_write(int fd, eventfd_t value)
  21 {
  22         return (sizeof(value) == write(fd, &value, sizeof(value))) ? 0 : -1;
  23 }