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* include/cygwin/config.h (__getreent): Define inline version.

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Brian Dessent
2007-09-07 00:44:27 +00:00
parent e65aa07ac6
commit 6e08b2f7f8
2 changed files with 25 additions and 0 deletions
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4
winsup/cygwin/ChangeLog
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@@ -1,3 +1,7 @@
2007-09-06 Brian Dessent <brian@dessent.net>
* include/cygwin/config.h (__getreent): Define inline version.
2007-09-06 Brian Dessent <brian@dessent.net>
* include/sys/stdio.h (_flockfile): Don't try to lock a FILE

21
winsup/cygwin/include/cygwin/config.h
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@@ -20,6 +20,27 @@ extern "C" {
#define _CYGWIN_CONFIG_H
#define __DYNAMIC_REENT__
/* The following provides an inline version of __getreent() for newlib,
which will be used throughout the library whereever there is a _r
version of a function that takes _REENT. This saves the overhead
of a function call for what amounts to a simple computation.
The definition below is essentially equivalent to the one in cygtls.h
(&_my_tls.local_clib) however it uses a fixed precomputed
offset rather than dereferencing a field of a structure.
Including tlsoffets.h here in order to get this constant offset
tls_local_clib is a bit of a hack, but the alternative would require
dragging the entire definition of struct _cygtls (a large and complex
Cygwin internal data structure) into newlib. The machinery to
compute these offsets already exists for the sake of gendef so
we might as well just use it here. */
#include "../tlsoffsets.h"
extern char *_tlsbase __asm__ ("%fs:4");
#define __getreent() (struct _reent *)(_tlsbase + tls_local_clib)
#define __FILENAME_MAX__ (260 - 1 /* NUL */)
#define _READ_WRITE_RETURN_TYPE _ssize_t
#define __LARGE64_FILES 1