// license that can be found in the LICENSE file.

package poll

import (
	"errors"
	"internal/syscall/unix"
	"syscall"
)

// Fsync invokes SYS_FCNTL with SYS_FULLFSYNC because
// on OS X, SYS_FSYNC doesn't fully flush contents to disk.
// See Issue #26650 as well as the man page for fsync on OS X.
func (fd *FD) Fsync() error {
	if err := fd.incref(); err != nil {
		return err
	}
	defer fd.decref()

	SYS_VMSPLICE               = 75
	SYS_SPLICE                 = 76
	SYS_TEE                    = 77
	SYS_READLINKAT             = 78
	SYS_FSTATAT                = 79
	SYS_FSTAT                  = 80
	SYS_SYNC                   = 81
	SYS_FSYNC                  = 82
	SYS_FDATASYNC              = 83
	SYS_SYNC_FILE_RANGE        = 84
	SYS_TIMERFD_CREATE         = 85
	SYS_TIMERFD_SETTIME        = 86
	SYS_TIMERFD_GETTIME        = 87

	SYS_VMSPLICE               = 75
	SYS_SPLICE                 = 76
	SYS_TEE                    = 77
	SYS_READLINKAT             = 78
	SYS_FSTATAT                = 79
	SYS_FSTAT                  = 80
	SYS_SYNC                   = 81
	SYS_FSYNC                  = 82
	SYS_FDATASYNC              = 83
	SYS_SYNC_FILE_RANGE2       = 84
	SYS_SYNC_FILE_RANGE        = 84
	SYS_TIMERFD_CREATE         = 85
	SYS_TIMERFD_SETTIME        = 86

	SYS_MSGGET                 = 5066
	SYS_MSGSND                 = 5067
	SYS_MSGRCV                 = 5068
	SYS_MSGCTL                 = 5069
	SYS_FCNTL                  = 5070
	SYS_FLOCK                  = 5071
	SYS_FSYNC                  = 5072
	SYS_FDATASYNC              = 5073
	SYS_TRUNCATE               = 5074
	SYS_FTRUNCATE              = 5075
	SYS_GETDENTS               = 5076
	SYS_GETCWD                 = 5077

	SYS_MSGGET                 = 5066
	SYS_MSGSND                 = 5067
	SYS_MSGRCV                 = 5068
	SYS_MSGCTL                 = 5069
	SYS_FCNTL                  = 5070
	SYS_FLOCK                  = 5071
	SYS_FSYNC                  = 5072
	SYS_FDATASYNC              = 5073
	SYS_TRUNCATE               = 5074
	SYS_FTRUNCATE              = 5075
	SYS_GETDENTS               = 5076
	SYS_GETCWD                 = 5077

	SYS_MSGGET                 = 68
	SYS_MSGSND                 = 69
	SYS_MSGRCV                 = 70
	SYS_MSGCTL                 = 71
	SYS_FCNTL                  = 72
	SYS_FLOCK                  = 73
	SYS_FSYNC                  = 74
	SYS_FDATASYNC              = 75
	SYS_TRUNCATE               = 76
	SYS_FTRUNCATE              = 77
	SYS_GETDENTS               = 78
	SYS_GETCWD                 = 79
	SYS_CHDIR                  = 80

	SYS_VHANGUP                = 111
	SYS_IDLE                   = 112
	SYS_WAIT4                  = 114
	SYS_SWAPOFF                = 115
	SYS_SYSINFO                = 116
	SYS_IPC                    = 117
	SYS_FSYNC                  = 118
	SYS_SIGRETURN              = 119
	SYS_CLONE                  = 120
	SYS_SETDOMAINNAME          = 121
	SYS_UNAME                  = 122
	SYS_ADJTIMEX               = 124

	SYS_SIGNALFD4               = 74
	SYS_VMSPLICE                = 75
	SYS_SPLICE                  = 76
	SYS_TEE                     = 77
	SYS_READLINKAT              = 78
	SYS_SYNC                    = 81
	SYS_FSYNC                   = 82
	SYS_FDATASYNC               = 83
	SYS_SYNC_FILE_RANGE         = 84
	SYS_TIMERFD_CREATE          = 85
	SYS_TIMERFD_SETTIME         = 86
	SYS_TIMERFD_GETTIME         = 87

	SYS_SIGNALFD4               = 74
	SYS_VMSPLICE                = 75
	SYS_SPLICE                  = 76
	SYS_TEE                     = 77
	SYS_READLINKAT              = 78
	SYS_SYNC                    = 81
	SYS_FSYNC                   = 82
	SYS_FDATASYNC               = 83
	SYS_SYNC_FILE_RANGE         = 84
	SYS_TIMERFD_CREATE          = 85
	SYS_TIMERFD_SETTIME         = 86
	SYS_TIMERFD_GETTIME         = 87

	SYS_ACCEPT4        = 93  // { int sys_accept4(int s, struct sockaddr *name, \
	SYS___THRSLEEP     = 94  // { int sys___thrsleep(const volatile void *ident, \
	SYS_FSYNC          = 95  // { int sys_fsync(int fd); }
	SYS_SETPRIORITY    = 96  // { int sys_setpriority(int which, id_t who, int prio); }
	SYS_SOCKET         = 97  // { int sys_socket(int domain, int type, int protocol); }