platform/beos.cpp
author Ryan C. Gordon <icculus@icculus.org>
Sun, 11 Mar 2007 10:10:28 +0000
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child 818 e36f23f49042
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/*
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 * BeOS platform-dependent support routines for PhysicsFS.
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 *
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 * Please see the file LICENSE.txt in the source's root directory.
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 *
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 *  This file written by Ryan C. Gordon.
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 */
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#ifdef __BEOS__
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#include <be/kernel/OS.h>
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#include <be/app/Roster.h>
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#include <be/storage/Volume.h>
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#include <be/storage/VolumeRoster.h>
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#include <be/storage/Directory.h>
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#include <be/storage/Entry.h>
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#include <be/storage/Path.h>
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#include <be/kernel/fs_info.h>
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#include <be/device/scsi.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <errno.h>
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#include <unistd.h>
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#define __PHYSICSFS_INTERNAL__
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#include "physfs_internal.h"
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const char *__PHYSFS_platformDirSeparator = "/";
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int __PHYSFS_platformInit(void)
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{
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    return(1);  /* always succeed. */
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} /* __PHYSFS_platformInit */
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int __PHYSFS_platformDeinit(void)
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{
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    return(1);  /* always succeed. */
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} /* __PHYSFS_platformDeinit */
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static char *getMountPoint(const char *devname)
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{
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    BVolumeRoster mounts;
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    BVolume vol;
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    mounts.Rewind();
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    while (mounts.GetNextVolume(&vol) == B_NO_ERROR)
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    {
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        fs_info fsinfo;
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        fs_stat_dev(vol.Device(), &fsinfo);
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        if (strcmp(devname, fsinfo.device_name) == 0)
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        {
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            //char buf[B_FILE_NAME_LENGTH];
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            BDirectory directory;
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            BEntry entry;
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            BPath path;
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            status_t rc;
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            rc = vol.GetRootDirectory(&directory);
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            BAIL_IF_MACRO(rc < B_OK, strerror(rc), NULL);
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            rc = directory.GetEntry(&entry);
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            BAIL_IF_MACRO(rc < B_OK, strerror(rc), NULL);
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            rc = entry.GetPath(&path);
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            BAIL_IF_MACRO(rc < B_OK, strerror(rc), NULL);
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            const char *str = path.Path();
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            BAIL_IF_MACRO(str == NULL, ERR_OS_ERROR, NULL);  /* ?! */
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            char *retval = (char *) allocator.Malloc(strlen(str) + 1);
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            BAIL_IF_MACRO(retval == NULL, ERR_OUT_OF_MEMORY, NULL);
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            strcpy(retval, str);
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            return(retval);
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        } /* if */
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    } /* while */
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    return(NULL);
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} /* getMountPoint */
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    /*
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     * This function is lifted from Simple Directmedia Layer (SDL):
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     *  http://www.libsdl.org/
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     */
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static void tryDir(const char *d, PHYSFS_StringCallback callback, void *data)
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{
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    BDirectory dir;
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    dir.SetTo(d);
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    if (dir.InitCheck() != B_NO_ERROR)
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        return;
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    dir.Rewind();
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    BEntry entry;
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    while (dir.GetNextEntry(&entry) >= 0)
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    {
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        BPath path;
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        const char *name;
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        entry_ref e;
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        if (entry.GetPath(&path) != B_NO_ERROR)
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            continue;
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        name = path.Path();
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        if (entry.GetRef(&e) != B_NO_ERROR)
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            continue;
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        if (entry.IsDirectory())
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        {
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            if (strcmp(e.name, "floppy") != 0)
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                tryDir(name, callback, data);
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        } /* if */
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        else
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        {
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            bool add_it = false;
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            int devfd;
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            device_geometry g;
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            if (strcmp(e.name, "raw") == 0)  /* ignore partitions. */
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            {
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                int devfd = open(name, O_RDONLY);
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                if (devfd >= 0)
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                {
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                    if (ioctl(devfd, B_GET_GEOMETRY, &g, sizeof(g)) >= 0)
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                    {
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                        if (g.device_type == B_CD)
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                        {
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                            char *mntpnt = getMountPoint(name);
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                            if (mntpnt != NULL)
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                            {
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                                callback(data, mntpnt);
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                                allocator.Free(mntpnt);  /* !!! FIXME: lose this malloc! */
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                            } /* if */
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                        } /* if */
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                    } /* if */
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                } /* if */
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            } /* if */
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            close(devfd);
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        } /* else */
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    } /* while */
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} /* tryDir */
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void __PHYSFS_platformDetectAvailableCDs(PHYSFS_StringCallback cb, void *data)
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{
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    tryDir("/dev/disk", cb, data);
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} /* __PHYSFS_platformDetectAvailableCDs */
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static team_id getTeamID(void)
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{
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    thread_info info;
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    thread_id tid = find_thread(NULL);
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    get_thread_info(tid, &info);
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    return(info.team);
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} /* getMyTeamID */
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char *__PHYSFS_platformCalcBaseDir(const char *argv0)
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{
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    /* in case there isn't a BApplication yet, we'll construct a roster. */
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    BRoster roster; 
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    app_info info;
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    status_t rc = roster.GetRunningAppInfo(getTeamID(), &info);
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    BAIL_IF_MACRO(rc < B_OK, strerror(rc), NULL);
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    BEntry entry(&(info.ref), true);
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    BPath path;
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    rc = entry.GetPath(&path);  /* (path) now has binary's path. */
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    assert(rc == B_OK);
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    rc = path.GetParent(&path); /* chop filename, keep directory. */
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    assert(rc == B_OK);
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    const char *str = path.Path();
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    assert(str != NULL);
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    char *retval = (char *) allocator.Malloc(strlen(str) + 1);
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    BAIL_IF_MACRO(retval == NULL, ERR_OUT_OF_MEMORY, NULL);
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    strcpy(retval, str);
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    return(retval);
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} /* __PHYSFS_platformCalcBaseDir */
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PHYSFS_uint64 __PHYSFS_platformGetThreadID(void)
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{
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    return((PHYSFS_uint64) find_thread(NULL));
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} /* __PHYSFS_platformGetThreadID */
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/* Much like my college days, try to sleep for 10 milliseconds at a time... */
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void __PHYSFS_platformTimeslice(void)
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{
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    snooze(10000);  /* put thread to sleep for 10 milliseconds. */
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} /* __PHYSFS_platformTimeslice */
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char *__PHYSFS_platformRealPath(const char *path)
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{
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    BPath normalized(path, NULL, true);  /* force normalization of path. */
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    const char *resolved_path = normalized.Path();
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    BAIL_IF_MACRO(resolved_path == NULL, ERR_NO_SUCH_FILE, NULL);
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    char *retval = (char *) allocator.Malloc(strlen(resolved_path) + 1);
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    BAIL_IF_MACRO(retval == NULL, ERR_OUT_OF_MEMORY, NULL);
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    strcpy(retval, resolved_path);
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    return(retval);
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} /* __PHYSFS_platformRealPath */
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void *__PHYSFS_platformCreateMutex(void)
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{
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    sem_id *retval = (sem_id *) allocator.Malloc(sizeof (sem_id));
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    sem_id rc;
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    BAIL_IF_MACRO(retval == NULL, ERR_OUT_OF_MEMORY, NULL);
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    rc = create_sem(1, "PhysicsFS semaphore");
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    if (rc < B_OK)
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    {
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        allocator.Free(retval);
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        BAIL_MACRO(strerror(rc), NULL);
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    } // if
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    *retval = rc;
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    return(retval);
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} /* __PHYSFS_platformCreateMutex */
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void __PHYSFS_platformDestroyMutex(void *mutex)
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{
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    delete_sem( *((sem_id *) mutex) );
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    allocator.Free(mutex);
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} /* __PHYSFS_platformDestroyMutex */
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int __PHYSFS_platformGrabMutex(void *mutex)
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{
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    status_t rc = acquire_sem(*((sem_id *) mutex));
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    BAIL_IF_MACRO(rc < B_OK, strerror(rc), 0);
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    return(1);
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} /* __PHYSFS_platformGrabMutex */
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void __PHYSFS_platformReleaseMutex(void *mutex)
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{
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    release_sem(*((sem_id *) mutex));
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} /* __PHYSFS_platformReleaseMutex */
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#endif
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/* end of beos.cpp ... */
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