source:
rtems/cpukit/libcsupport/src/sync.c
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b2b143f4
Last change on this file since b2b143f4 was b2b143f4, checked in by Joel Sherrill <joel.sherrill@…>, on 03/05/04 at 17:58:51 | |
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1 | /* |
2 | * sync() - XXX ??? where is this defined |
3 | * |
4 | * This function operates by as follows: |
5 | * for all threads |
6 | * for all FILE * |
7 | * fsync() |
8 | * fdatasync() |
9 | * |
10 | * COPYRIGHT (c) 1989-2003. |
11 | * On-Line Applications Research Corporation (OAR). |
12 | * |
13 | * The license and distribution terms for this file may be |
14 | * found in the file LICENSE in this distribution or at |
15 | * http://www.rtems.com/license/LICENSE. |
16 | * |
17 | * $Id$ |
18 | */ |
19 | |
20 | #if HAVE_CONFIG_H |
21 | #include "config.h" |
22 | #endif |
23 | |
24 | /* Since we compile with strict ANSI we need to undef it to get |
25 | * prototypes for extensions |
26 | */ |
27 | #undef __STRICT_ANSI__ |
28 | int fdatasync(int); /* still not always prototyped */ |
29 | |
30 | |
31 | #include <unistd.h> |
32 | #include <stdio.h> |
33 | |
34 | #include <rtems.h> |
35 | /* |
36 | #define __RTEMS_VIOLATE_KERNEL_VISIBILITY__ |
37 | |
38 | #include <rtems/libio_.h> |
39 | #include <rtems/seterr.h> |
40 | */ |
41 | |
42 | /* XXX check standards -- Linux version appears to be void */ |
43 | void _fwalk(struct _reent *, void *); |
44 | |
45 | |
46 | static void sync_wrapper(FILE *f) |
47 | { |
48 | int fn = fileno(f); |
49 | |
50 | fsync(fn); |
51 | fdatasync(fn); |
52 | } |
53 | |
54 | /* iterate over all FILE *'s for this thread */ |
55 | static void sync_per_thread(Thread_Control *t) |
56 | { |
57 | struct _reent *current_reent; |
58 | |
59 | /* |
60 | * The sync_wrapper() function will operate on the current thread's |
61 | * reent structure so we will temporarily use that. |
62 | */ |
63 | current_reent = _Thread_Executing->libc_reent; |
64 | _Thread_Executing->libc_reent = t->libc_reent; |
65 | _fwalk (t->libc_reent, sync_wrapper); |
66 | _Thread_Executing->libc_reent = current_reent; |
67 | } |
68 | |
69 | int sync(void) |
70 | { |
71 | extern struct _reent libc_global_reent; |
72 | |
73 | /* |
74 | * Walk the one used initially by RTEMS. |
75 | */ |
76 | _fwalk(&libc_global_reent, sync_wrapper); |
77 | |
78 | /* |
79 | * XXX Do we walk the one used globally by newlib? |
80 | * XXX Do we need the RTEMS global one? |
81 | */ |
82 | |
83 | /* |
84 | * Now walk all the per-thread reentrancy structures. |
85 | */ |
86 | rtems_iterate_over_all_threads(sync_per_thread); |
87 | |
88 | return 0; |
89 | } |
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