1#include <sys/eventfd.h> 2#include <unistd.h> 3#include <errno.h> 4#include "syscall.h" 5 6int 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 15int eventfd_read(int fd, eventfd_t *value) 16{ 17 return (sizeof(*value) == read(fd, value, sizeof(*value))) ? 0 : -1; 18} 19 20int eventfd_write(int fd, eventfd_t value) 21{ 22 return (sizeof(value) == write(fd, &value, sizeof(value))) ? 0 : -1; 23} 24