syscall: Add Gettid on GNU/Linux systems.

From-SVN: r183775

diff --git a/libgo/go/syscall/libcall_linux.go b/libgo/go/syscall/libcall_linux.go
index 7e88d04..aa14401 100644 (file)
--- a/libgo/go/syscall/libcall_linux.go
+++ b/libgo/go/syscall/libcall_linux.go
@@ -195,9 +195,10 @@ func PtraceDetach(pid int) (err error) { return ptrace(PTRACE_DETACH, pid, 0, 0)
 // //sys       Fstatfs(fd int, buf *Statfs_t) (err error)
 // //fstatfs(fd int, buf *Statfs_t) int
 
-// FIXME: Only available as a syscall.
-// //sysnb     Gettid() (tid int)
-// //gettid() Pid_t
+func Gettid() (tid int) {
+       r1, _, _ := Syscall(SYS_GETTID, 0, 0, 0)
+       return int(r1)
+}
 
 // FIXME: mksysinfo linux_dirent
 //    Or just abandon this function.