* libc/include/stdio.h (__SNLK): Define.

* libc/include/stdio_ext.h (FSETLOCKING_QUERY, FSETLOCKING_INTERNAL,
FSETLOCKING_BYCALLER): Define.
(__fsetlocking): Declare.
* libc/stdio/Makefile.am: Build fsetlocking.c.
* libc/stdio/Makefile.in: Regenerate.
* libc/stdio/fsetlocking.c: New file.
* libc/stdio/local.h (_newlib_flockfile_start): Make _flockfile
call dependent on __SNLK flag.
(_newlib_flockfile_exit, _newlib_flockfile_end): Ditto for
_funlockfile calls.
Define all locking macros as empty if __SINGLE_THREAD__.
* libc/stdio/stdio.tex: Include fsetlocking.def.

diff --git a/newlib/ChangeLog b/newlib/ChangeLog
index 526a66de2757f209794609380c8426e27d5b2807..e092d1f62c7225a4f8faf623303553ad8c5250fd 100644 (file)
--- a/newlib/ChangeLog
+++ b/newlib/ChangeLog
@@ -1,3 +1,19 @@
+2014-12-15  Yaakov Selkowitz  <yselkowi@redhat.com>
+
+       * libc/include/stdio.h (__SNLK): Define.
+       * libc/include/stdio_ext.h (FSETLOCKING_QUERY, FSETLOCKING_INTERNAL,
+       FSETLOCKING_BYCALLER): Define.
+       (__fsetlocking): Declare.
+       * libc/stdio/Makefile.am: Build fsetlocking.c.
+       * libc/stdio/Makefile.in: Regenerate.
+       * libc/stdio/fsetlocking.c: New file.
+       * libc/stdio/local.h (_newlib_flockfile_start): Make _flockfile
+       call dependent on __SNLK flag.
+       (_newlib_flockfile_exit, _newlib_flockfile_end): Ditto for
+       _funlockfile calls.
+       Define all locking macros as empty if __SINGLE_THREAD__.
+       * libc/stdio/stdio.tex: Include fsetlocking.def.
+
 2014-12-15  Nick Hung  <nick@andestech.com>
 
        * newlib/libc/include/machine/setjmp.h: Add FPU support.

diff --git a/newlib/libc/include/stdio.h b/newlib/libc/include/stdio.h
index 620bfbcf283a651079bb76ec24b61e3f9e90a944..eb2d24939f6ec6dae9ae27eaf5a89dbc7e9b5fb1 100644 (file)
--- a/newlib/libc/include/stdio.h
+++ b/newlib/libc/include/stdio.h
@@ -83,6 +83,7 @@ typedef _fpos64_t fpos64_t;
 #define        __SL64  0x8000          /* is 64-bit offset large file */
 
 /* _flags2 flags */
+#define        __SNLK  0x0001          /* stdio functions do not lock streams themselves */
 #define        __SWID  0x2000          /* true => stream orientation wide, false => byte, only valid if __SORD in _flags is true */
 
 /*

diff --git a/newlib/libc/include/stdio_ext.h b/newlib/libc/include/stdio_ext.h
index 4b6f8ae36edb890fcb1d828a9a8f29f25239ed42..029ab02535357d2877d0f1bf4145fa8ec58b4620 100644 (file)
--- a/newlib/libc/include/stdio_ext.h
+++ b/newlib/libc/include/stdio_ext.h
@@ -13,14 +13,18 @@
 
 #include <stdio.h>
 
+#define        FSETLOCKING_QUERY       0
+#define        FSETLOCKING_INTERNAL    1
+#define        FSETLOCKING_BYCALLER    2
+
 _BEGIN_STD_C
 
 void    _EXFUN(__fpurge,(FILE *));
+int     _EXFUN(__fsetlocking,(FILE *, int));
 
 /* TODO:
 
    void _flushlbf (void);
-   int __fsetlocking (FILE *__fp, int __type);
 */
 
 #ifdef  __GNUC__

diff --git a/newlib/libc/stdio/Makefile.am b/newlib/libc/stdio/Makefile.am
index 8069ead16f2f71d9c8e7b1518af08cb8da74eca4..360d0de4b0beb4edfc951a63d44b1e7de576faf2 100644 (file)
--- a/newlib/libc/stdio/Makefile.am
+++ b/newlib/libc/stdio/Makefile.am
@@ -146,6 +146,7 @@ ELIX_4_SOURCES = \
        fpurge.c                \
        fputwc.c                \
        fputws.c                \
+       fsetlocking.c           \
        funopen.c               \
        fwide.c                 \
        fwprintf.c              \
@@ -357,6 +358,7 @@ CHEWOUT_FILES = \
        fread.def               \
        freopen.def             \
        fseek.def               \
+       fsetlocking.def         \
        fsetpos.def             \
        ftell.def               \
        funopen.def             \
@@ -433,6 +435,7 @@ $(lpfx)fputws.$(oext): local.h fvwrite.h
 $(lpfx)fread.$(oext): local.h
 $(lpfx)freopen.$(oext): local.h
 $(lpfx)fseek.$(oext): local.h
+$(lpfx)fsetlocking.$(oext): local.h
 $(lpfx)ftell.$(oext): local.h
 $(lpfx)funopen.$(oext): local.h
 $(lpfx)fvwrite.$(oext): local.h fvwrite.h

diff --git a/newlib/libc/stdio/Makefile.in b/newlib/libc/stdio/Makefile.in
index e1c4866f10e16005968e67f6395107e90247c56c..72b386e1886e29017a4334a023d467643a6d68ce 100644 (file)
--- a/newlib/libc/stdio/Makefile.in
+++ b/newlib/libc/stdio/Makefile.in
@@ -143,6 +143,7 @@ am__objects_2 = $(am__objects_1) lib_a-clearerr.$(OBJEXT) \
 @ELIX_LEVEL_1_FALSE@@ELIX_LEVEL_2_FALSE@@ELIX_LEVEL_3_FALSE@   lib_a-fpurge.$(OBJEXT) \
 @ELIX_LEVEL_1_FALSE@@ELIX_LEVEL_2_FALSE@@ELIX_LEVEL_3_FALSE@   lib_a-fputwc.$(OBJEXT) \
 @ELIX_LEVEL_1_FALSE@@ELIX_LEVEL_2_FALSE@@ELIX_LEVEL_3_FALSE@   lib_a-fputws.$(OBJEXT) \
+@ELIX_LEVEL_1_FALSE@@ELIX_LEVEL_2_FALSE@@ELIX_LEVEL_3_FALSE@   lib_a-fsetlocking.$(OBJEXT) \
 @ELIX_LEVEL_1_FALSE@@ELIX_LEVEL_2_FALSE@@ELIX_LEVEL_3_FALSE@   lib_a-funopen.$(OBJEXT) \
 @ELIX_LEVEL_1_FALSE@@ELIX_LEVEL_2_FALSE@@ELIX_LEVEL_3_FALSE@   lib_a-fwide.$(OBJEXT) \
 @ELIX_LEVEL_1_FALSE@@ELIX_LEVEL_2_FALSE@@ELIX_LEVEL_3_FALSE@   lib_a-fwprintf.$(OBJEXT) \
@@ -206,6 +207,7 @@ am__objects_8 = $(am__objects_7) clearerr.lo fclose.lo fdopen.lo \
 @ELIX_LEVEL_1_FALSE@@ELIX_LEVEL_2_FALSE@@ELIX_LEVEL_3_FALSE@   fpurge.lo \
 @ELIX_LEVEL_1_FALSE@@ELIX_LEVEL_2_FALSE@@ELIX_LEVEL_3_FALSE@   fputwc.lo \
 @ELIX_LEVEL_1_FALSE@@ELIX_LEVEL_2_FALSE@@ELIX_LEVEL_3_FALSE@   fputws.lo \
+@ELIX_LEVEL_1_FALSE@@ELIX_LEVEL_2_FALSE@@ELIX_LEVEL_3_FALSE@   fsetlocking.lo \
 @ELIX_LEVEL_1_FALSE@@ELIX_LEVEL_2_FALSE@@ELIX_LEVEL_3_FALSE@   funopen.lo \
 @ELIX_LEVEL_1_FALSE@@ELIX_LEVEL_2_FALSE@@ELIX_LEVEL_3_FALSE@   fwide.lo \
 @ELIX_LEVEL_1_FALSE@@ELIX_LEVEL_2_FALSE@@ELIX_LEVEL_3_FALSE@   fwprintf.lo \
@@ -514,6 +516,7 @@ GENERAL_SOURCES = \
 @ELIX_LEVEL_1_FALSE@@ELIX_LEVEL_2_FALSE@@ELIX_LEVEL_3_FALSE@   fpurge.c                \
 @ELIX_LEVEL_1_FALSE@@ELIX_LEVEL_2_FALSE@@ELIX_LEVEL_3_FALSE@   fputwc.c                \
 @ELIX_LEVEL_1_FALSE@@ELIX_LEVEL_2_FALSE@@ELIX_LEVEL_3_FALSE@   fputws.c                \
+@ELIX_LEVEL_1_FALSE@@ELIX_LEVEL_2_FALSE@@ELIX_LEVEL_3_FALSE@   fsetlocking.c           \
 @ELIX_LEVEL_1_FALSE@@ELIX_LEVEL_2_FALSE@@ELIX_LEVEL_3_FALSE@   funopen.c               \
 @ELIX_LEVEL_1_FALSE@@ELIX_LEVEL_2_FALSE@@ELIX_LEVEL_3_FALSE@   fwide.c                 \
 @ELIX_LEVEL_1_FALSE@@ELIX_LEVEL_2_FALSE@@ELIX_LEVEL_3_FALSE@   fwprintf.c              \
@@ -631,6 +634,7 @@ CHEWOUT_FILES = \
        fread.def               \
        freopen.def             \
        fseek.def               \
+       fsetlocking.def         \
        fsetpos.def             \
        ftell.def               \
        funopen.def             \
@@ -1355,6 +1359,12 @@ lib_a-fputws.o: fputws.c
 lib_a-fputws.obj: fputws.c
        $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(lib_a_CFLAGS) $(CFLAGS) -c -o lib_a-fputws.obj `if test -f 'fputws.c'; then $(CYGPATH_W) 'fputws.c'; else $(CYGPATH_W) '$(srcdir)/fputws.c'; fi`
 
+lib_a-fsetlocking.o: fsetlocking.c
+       $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(lib_a_CFLAGS) $(CFLAGS) -c -o lib_a-fsetlocking.o `test -f 'fsetlocking.c' || echo '$(srcdir)/'`fsetlocking.c
+
+lib_a-fsetlocking.obj: fsetlocking.c
+       $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(lib_a_CFLAGS) $(CFLAGS) -c -o lib_a-fsetlocking.obj `if test -f 'fsetlocking.c'; then $(CYGPATH_W) 'fsetlocking.c'; else $(CYGPATH_W) '$(srcdir)/fsetlocking.c'; fi`
+
 lib_a-funopen.o: funopen.c
        $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(lib_a_CFLAGS) $(CFLAGS) -c -o lib_a-funopen.o `test -f 'funopen.c' || echo '$(srcdir)/'`funopen.c
 
@@ -1772,6 +1782,7 @@ $(lpfx)fputws.$(oext): local.h fvwrite.h
 $(lpfx)fread.$(oext): local.h
 $(lpfx)freopen.$(oext): local.h
 $(lpfx)fseek.$(oext): local.h
+$(lpfx)fsetlocking.$(oext): local.h
 $(lpfx)ftell.$(oext): local.h
 $(lpfx)funopen.$(oext): local.h
 $(lpfx)fvwrite.$(oext): local.h fvwrite.h

diff --git a/newlib/libc/stdio/fsetlocking.c b/newlib/libc/stdio/fsetlocking.c
new file mode 100644 (file)
index 0000000..3c489f5
--- /dev/null
+++ b/newlib/libc/stdio/fsetlocking.c
@@ -0,0 +1,90 @@
+/*
+ * Copyright (c) 2014 Red Hat, Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+/*
+FUNCTION
+<<__fsetlocking>>---set or query locking mode on FILE stream
+
+INDEX
+       __fsetlocking
+
+ANSI_SYNOPSIS
+       #include <stdio.h>
+       #include <stdio_ext.h>
+       int __fsetlocking(FILE *<[fp]>, int <[type]>);
+
+DESCRIPTION
+This function sets how the stdio functions handle locking of FILE <[fp]>.
+The following values describe <[type]>:
+
+<<FSETLOCKING_INTERNAL>> is the default state, where stdio functions
+automatically lock and unlock the stream.
+
+<<FSETLOCKING_BYCALLER>> means that automatic locking in stdio functions
+is disabled. Applications which set this take all responsibility for file
+locking themselves.
+
+<<FSETLOCKING_QUERY>> returns the current locking mode without changing it.
+
+RETURNS
+<<__fsetlocking>> returns the current locking mode of <[fp]>.
+
+PORTABILITY
+This function originates from Solaris and is also provided by GNU libc.
+
+No supporting OS subroutines are required.
+*/
+
+#ifndef __rtems__
+
+#include <_ansi.h>
+#include <stdio.h>
+#include <stdio_ext.h>
+#include "local.h"
+
+int
+_DEFUN(__fsetlocking, (fp, type),
+       FILE * fp _AND
+       int type)
+{
+  int result;
+  CHECK_INIT(_REENT, fp);
+  result = (fp->_flags2 & __SNLK) ? FSETLOCKING_BYCALLER : FSETLOCKING_INTERNAL;
+  switch (type)
+    {
+    case FSETLOCKING_BYCALLER:
+      fp->_flags2 |= __SNLK;
+      break;
+    case FSETLOCKING_INTERNAL:
+      fp->_flags2 &= ~__SNLK;
+      break;
+    case FSETLOCKING_QUERY:
+    default:
+      break;
+    }
+  return result;
+}
+
+#endif /* __rtems__ */

diff --git a/newlib/libc/stdio/local.h b/newlib/libc/stdio/local.h
index 24d21360e5961b28155b1fb19c892f4624091436..434d3f85cb2cd3ae4601fd76c872407e7e804ccf 100644 (file)
--- a/newlib/libc/stdio/local.h
+++ b/newlib/libc/stdio/local.h
@@ -68,16 +68,19 @@
        { \
          int __oldfpcancel; \
          pthread_setcancelstate (PTHREAD_CANCEL_DISABLE, &__oldfpcancel); \
-         _flockfile (_fp)
+         if (!(_fp->_flags2 & __SNLK)) \
+           _flockfile (_fp)
 
 /* Exit from a stream oriented critical section prematurely: */
 # define _newlib_flockfile_exit(_fp) \
-         _funlockfile (_fp); \
+         if (!(_fp->_flags2 & __SNLK)) \
+           _funlockfile (_fp); \
          pthread_setcancelstate (__oldfpcancel, &__oldfpcancel);
 
 /* End a stream oriented critical section: */
 # define _newlib_flockfile_end(_fp) \
-         _funlockfile (_fp); \
+         if (!(_fp->_flags2 & __SNLK)) \
+           _funlockfile (_fp); \
          pthread_setcancelstate (__oldfpcancel, &__oldfpcancel); \
        }
 
@@ -99,17 +102,20 @@
          pthread_setcancelstate (__oldsfpcancel, &__oldsfpcancel); \
        }
 
-#else /* !_STDIO_WITH_THREAD_CANCELLATION_SUPPORT */
+#elif !defined(__SINGLE_THREAD__) /* !_STDIO_WITH_THREAD_CANCELLATION_SUPPORT */
 
 # define _newlib_flockfile_start(_fp) \
        { \
-               _flockfile(_fp)
+               if (!(_fp->_flags2 & __SNLK)) \
+                 _flockfile (_fp)
 
 # define _newlib_flockfile_exit(_fp) \
-               _funlockfile(_fp); \
+               if (!(_fp->_flags2 & __SNLK)) \
+                 _funlockfile(_fp); \
 
 # define _newlib_flockfile_end(_fp) \
-               _funlockfile(_fp); \
+               if (!(_fp->_flags2 & __SNLK)) \
+                 _funlockfile(_fp); \
        }
 
 # define _newlib_sfp_lock_start() \
@@ -123,6 +129,15 @@
                __sfp_lock_release (); \
        }
 
+#else /* __SINGLE_THREAD__ */
+
+# define _newlib_flockfile_start(_fp)
+# define _newlib_flockfile_exit(_fp)
+# define _newlib_flockfile_end(_fp)
+# define _newlib_sfp_lock_start()
+# define _newlib_sfp_lock_exit()
+# define _newlib_sfp_lock_end()
+
 #endif /* _STDIO_WITH_THREAD_CANCELLATION_SUPPORT */
 
 extern u_char *_EXFUN(__sccl, (char *, u_char *fmt));

diff --git a/newlib/libc/stdio/stdio.tex b/newlib/libc/stdio/stdio.tex
index 7b5427d7bb18283fdb6960bbc8b1af0df79cc386..69a210a24e30087f5704f2316ed479c204bfc5e5 100644 (file)
--- a/newlib/libc/stdio/stdio.tex
+++ b/newlib/libc/stdio/stdio.tex
@@ -177,6 +177,9 @@ structure.
 @page
 @include stdio/fseek.def
 
+@page
+@include stdio/fsetlocking.def
+
 @page
 @include stdio/fsetpos.def