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| author | julian <julian@FreeBSD.org> | 1996-01-22 00:02:33 +0000 |
|---|---|---|
| committer | julian <julian@FreeBSD.org> | 1996-01-22 00:02:33 +0000 |
| commit | 619b731f5bb5e09dcf1eaf1fbd96383ca64398fd (patch) | |
| tree | a89c7f50ec371cef4418259b9dccdd31ebb2f61f /lib/libc/sys/fsync.2 | |
| parent | 663b14fb2f3198fb0bfb62ae16b6b56c2a4dd055 (diff) | |
| download | FreeBSD-src-619b731f5bb5e09dcf1eaf1fbd96383ca64398fd.zip FreeBSD-src-619b731f5bb5e09dcf1eaf1fbd96383ca64398fd.tar.gz | |
Reviewed by: julian and (hsu?)
Submitted by: John Birrel(L?)
changes for threadsafe operations
Diffstat (limited to 'lib/libc/sys/fsync.2')
| -rw-r--r-- | lib/libc/sys/fsync.2 | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/lib/libc/sys/fsync.2 b/lib/libc/sys/fsync.2 index 234ea6e..1116cf9 100644 --- a/lib/libc/sys/fsync.2 +++ b/lib/libc/sys/fsync.2 @@ -53,6 +53,28 @@ of buffers for the associated file to be written to a disk. should be used by programs that require a file to be in a known state, for example, in building a simple transaction facility. +.Sh IMPLEMENTATION NOTES +.Pp +In the non-threaded library +.Fn fsync +is implemented as the +.Va fsync +syscall. +.Pp +In the threaded library, the +.Va fsync +syscall is assembled to +.Fn _thread_sys_fsync +and +.Fn fsync +is implemented as a function which locks +.Va fd +for read and write, then calls +.Fn _thread_sys_fsync . +Before returning, +.Fn fsync +unlocks +.Va fd . .Sh RETURN VALUES A 0 value is returned on success. A -1 value indicates an error. |
