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Viewing changes to src/sfifo.h

Committer: Bazaar Package Importer
Author(s): Daniel Kobras
Date: 2006-10-01 17:21:19 UTC
mto: (4.1.2 edgy) (5.1.1 gutsy) (6.1.1 experimental) (1.2.1 upstream)
mto: This revision was merged to the branch mainline in revision 5.
Revision ID: james.westby@ubuntu.com-20061001172119-ri8szi011ldi62bi

Tags: upstream-0.60

Import upstream version 0.60

files added:
AUTHORS

ChangeLog

MakeLegacy.sh

Makefile.am

Makefile.in

NEWS

aclocal.m4

build

build/config.guess

build/config.sub

build/depcomp

build/install-sh

build/missing

build/mkinstalldirs

configure

configure.ac

doc/BENCHMARKING

doc/BUGS

doc/CONTACT

doc/LICENSE

doc/PATENTS

doc/README.3DNOW

doc/README.WIN32

doc/README.gain

doc/README.remote

doc/ROAD_TO_LGPL

doc/THANKS

doc/TODO

src/Makefile.am

src/Makefile.in

src/Makefile.legacy

src/audio.c

src/audio.h

src/audio_aix.c

src/audio_alib.c

src/audio_alsa.c

src/audio_dummy.c

src/audio_esd.c

src/audio_hp.c

src/audio_jack.c

src/audio_macosx.c

src/audio_mint.c

src/audio_nas.c

src/audio_os2.c

src/audio_oss.c

src/audio_portaudio.c

src/audio_sdl.c

src/audio_sgi.c

src/audio_sun.c

src/audio_win32.c

src/buffer.c

src/buffer.h

src/common.c

src/common.h

src/config.h.in

src/control_generic.c

src/dct36_3dnow.s

src/dct64.c

src/dct64_3dnow.s

src/dct64_altivec.c

src/dct64_i386.c

src/dct64_i486.c

src/dct64_mmx.s

src/debug.h

src/decode.c

src/decode_2to1.c

src/decode_3dnow.s

src/decode_4to1.c

src/decode_i386.c

src/decode_i486.c

src/decode_i586.s

src/decode_i586_dither.s

src/decode_mmx.s

src/decode_ntom.c

src/equalizer.c

src/equalizer_3dnow.s

src/genre.h

src/getbits.c

src/getbits.h

src/getcpuflags.s

src/getlopt.c

src/getlopt.h

src/httpget.c

src/huffman.h

src/id3.c

src/id3.h

src/l2tables.h

src/layer1.c

src/layer2.c

src/layer3.c

src/layer3.h

src/mpg123.c

src/mpg123.h

src/playlist.c

src/playlist.h

src/readers.c

src/sfifo.c

src/sfifo.h

src/stringbuf.c

src/stringbuf.h

src/tabinit.c

src/tabinit_mmx.s

src/term.c

src/term.h

src/wav.c

src/xfermem.c

src/xfermem.h

files removed:
BENCHMARKING

BUGS

CHANGES

JUKEBOX

Makefile

Makefile.win32

README.WIN32

README.remote

TODO

audio.c

audio.h

audio_aix.c

audio_alib.c

audio_alsa.c

audio_dummy.c

audio_esd.c

audio_hp.c

audio_mint.c

audio_nas.c

audio_os2.c

audio_oss.c

audio_sgi.c

audio_sun.c

audio_win32.c

buffer.c

buffer.h

common.c

common.h

control_generic.c

control_sajber.c

control_tk3play.c

control_tk3play.h

dct64.c

dct64_3dnow.s

dct64_i386.c

dct64_i486.c

decode.c

decode_2to1.c

decode_3dnow.s

decode_4to1.c

decode_i386.c

decode_i486.c

decode_i586.s

decode_ntom.c

equalize.dat

equalizer.c

genre.h

getbits.c

getbits.h

getlopt.c

getlopt.h

httpget.c

huffman.h

jukebox

jukebox/README

jukebox/audio.h

jukebox/controldata.h

l2tables.h

layer1.c

layer2.c

layer3.c

mpg123.c

mpg123.h

mpglib

mpglib/Makefile

mpglib/README

mpglib/TODO

mpglib/common.c

mpglib/dct64_i386.c

mpglib/decode_i386.c

mpglib/huffman.h

mpglib/interface.c

mpglib/layer3.c

mpglib/main.c

mpglib/mpg123.h

mpglib/mpglib.h

mpglib/tabinit.c

precompiled

precompiled/linux-i386

precompiled/linux-i386/dct64_3dnow.o

precompiled/linux-i386/decode_3dnow.o

readers.c

system.c

tabinit.c

term.c

term.h

tools

tools/ASF.info

tools/asfCDtomp3

tools/interface-and-phython

version.h

wav.c

xfermem.c

xfermem.h

files modified:
COPYING

INSTALL

README

mpg123.1

Show diffs side-by-side

added added

removed removed

src/sfifo.h

SFIFO 1.3 Simple portable lock-free FIFO

* Platform support:

* gcc / Linux / x86: Works

* gcc / Linux / x86 kernel: Works

* gcc / FreeBSD / x86: Works

* gcc / NetBSD / x86: Works

* gcc / Mac OS X / PPC: Works

* gcc / Win32 / x86: Works

* Borland C++ / DOS / x86RM: Works

* Borland C++ / Win32 / x86PM16: Untested

* ? / Various Un*ces / ?: Untested

* ? / Mac OS / PPC: Untested

* gcc / BeOS / x86: Untested

* gcc / BeOS / PPC: Untested

* ? / ? / Alpha: Untested

* 1.2: Max buffer size halved, to avoid problems with

* the sign bit...

* 1.3: Critical buffer allocation bug fixed! For certain

* requested buffer sizes, older version would

* allocate a buffer of insufficient size, which

* would result in memory thrashing. (Amazing that

* I've manage to use this to the extent I have

* without running into this... *heh*)

#ifndef _SFIFO_H_

#define _SFIFO_H_

#ifdef __cplusplus

extern "C" {

#endif

#include <errno.h>

/*------------------------------------------------

"Private" stuff

------------------------------------------------*/

* Porting note:

* Reads and writes of a variable of this type in memory

* must be *atomic*! 'int' is *not* atomic on all platforms.

* A safe type should be used, and sfifo should limit the

* maximum buffer size accordingly.

typedef int sfifo_atomic_t;

#ifdef __TURBOC__

# define SFIFO_MAX_BUFFER_SIZE 0x7fff

#else /* Kludge: Assume 32 bit platform */

# define SFIFO_MAX_BUFFER_SIZE 0x7fffffff

#endif

typedef struct sfifo_t

{

char *buffer;

int size; /* Number of bytes */

sfifo_atomic_t readpos; /* Read position */

sfifo_atomic_t writepos; /* Write position */

} sfifo_t;

#define SFIFO_SIZEMASK(x) ((x)->size - 1)

/*------------------------------------------------

API

------------------------------------------------*/

int sfifo_init(sfifo_t *f, int size);

void sfifo_close(sfifo_t *f);

void sfifo_flush(sfifo_t *f);

int sfifo_write(sfifo_t *f, const void *buf, int len);

int sfifo_read(sfifo_t *f, void *buf, int len);

#define sfifo_used(x) (((x)->writepos - (x)->readpos) & SFIFO_SIZEMASK(x))

#define sfifo_space(x) ((x)->size - 1 - sfifo_used(x))

#define sfifo_size(x) ((x)->size - 1)

#ifdef __cplusplus

};

#endif

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