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physfs/platform/macosx.c

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/*
* Mac OS X support routines for PhysicsFS.
*
* Please see the file LICENSE.txt in the source's root directory.
*
* This file written by Ryan C. Gordon.
*/
#define __PHYSICSFS_INTERNAL__
#include "physfs_platforms.h"
#ifdef PHYSFS_PLATFORM_MACOSX
#include <Carbon/Carbon.h>
#include <IOKit/storage/IOMedia.h>
#include <IOKit/storage/IOCDMedia.h>
#include <IOKit/storage/IODVDMedia.h>
#include <sys/mount.h>
/* Seems to get defined in some system header... */
#ifdef Free
#undef Free
#endif
#include "physfs_internal.h"
/* Wrap PHYSFS_Allocator in a CFAllocator... */
static CFAllocatorRef cfallocator = NULL;
CFStringRef cfallocDesc(const void *info)
{
return(CFStringCreateWithCString(cfallocator, "PhysicsFS",
kCFStringEncodingASCII));
} /* cfallocDesc */
static void *cfallocMalloc(CFIndex allocSize, CFOptionFlags hint, void *info)
{
return allocator.Malloc(allocSize);
} /* cfallocMalloc */
static void cfallocFree(void *ptr, void *info)
{
allocator.Free(ptr);
} /* cfallocFree */
static void *cfallocRealloc(void *ptr, CFIndex newsize,
CFOptionFlags hint, void *info)
{
if ((ptr == NULL) || (newsize <= 0))
return NULL; /* ADC docs say you should always return NULL here. */
return allocator.Realloc(ptr, newsize);
} /* cfallocRealloc */
int __PHYSFS_platformInit(void)
{
/* set up a CFAllocator, so Carbon can use the physfs allocator, too. */
CFAllocatorContext ctx;
memset(&ctx, '\0', sizeof (ctx));
ctx.copyDescription = cfallocDesc;
ctx.allocate = cfallocMalloc;
ctx.reallocate = cfallocRealloc;
ctx.deallocate = cfallocFree;
cfallocator = CFAllocatorCreate(kCFAllocatorUseContext, &ctx);
BAIL_IF_MACRO(cfallocator == NULL, ERR_OUT_OF_MEMORY, 0);
return(1); /* success. */
} /* __PHYSFS_platformInit */
int __PHYSFS_platformDeinit(void)
{
CFRelease(cfallocator);
cfallocator = NULL;
return(1); /* always succeed. */
} /* __PHYSFS_platformDeinit */
/* CD-ROM detection code... */
/*
* Code based on sample from Apple Developer Connection:
* http://developer.apple.com/samplecode/Sample_Code/Devices_and_Hardware/Disks/VolumeToBSDNode/VolumeToBSDNode.c.htm
*/
static int darwinIsWholeMedia(io_service_t service)
{
int retval = 0;
CFTypeRef wholeMedia;
if (!IOObjectConformsTo(service, kIOMediaClass))
return(0);
wholeMedia = IORegistryEntryCreateCFProperty(service,
CFSTR(kIOMediaWholeKey),
cfallocator, 0);
if (wholeMedia == NULL)
return(0);
retval = CFBooleanGetValue(wholeMedia);
CFRelease(wholeMedia);
return retval;
} /* darwinIsWholeMedia */
static int darwinIsMountedDisc(char *bsdName, mach_port_t masterPort)
{
int retval = 0;
CFMutableDictionaryRef matchingDict;
kern_return_t rc;
io_iterator_t iter;
io_service_t service;
if ((matchingDict = IOBSDNameMatching(masterPort, 0, bsdName)) == NULL)
return(0);
rc = IOServiceGetMatchingServices(masterPort, matchingDict, &iter);
if ((rc != KERN_SUCCESS) || (!iter))
return(0);
service = IOIteratorNext(iter);
IOObjectRelease(iter);
if (!service)
return(0);
rc = IORegistryEntryCreateIterator(service, kIOServicePlane,
kIORegistryIterateRecursively | kIORegistryIterateParents, &iter);
if (!iter)
return(0);
if (rc != KERN_SUCCESS)
{
IOObjectRelease(iter);
return(0);
} /* if */
IOObjectRetain(service); /* add an extra object reference... */
do
{
if (darwinIsWholeMedia(service))
{
if ( (IOObjectConformsTo(service, kIOCDMediaClass)) ||
(IOObjectConformsTo(service, kIODVDMediaClass)) )
{
retval = 1;
} /* if */
} /* if */
IOObjectRelease(service);
} while ((service = IOIteratorNext(iter)) && (!retval));
IOObjectRelease(iter);
IOObjectRelease(service);
return(retval);
} /* darwinIsMountedDisc */
void __PHYSFS_platformDetectAvailableCDs(PHYSFS_StringCallback cb, void *data)
{
const char *devPrefix = "/dev/";
const int prefixLen = strlen(devPrefix);
mach_port_t masterPort = 0;
struct statfs *mntbufp;
int i, mounts;
if (IOMasterPort(MACH_PORT_NULL, &masterPort) != KERN_SUCCESS)
BAIL_MACRO(ERR_OS_ERROR, ) /*return void*/;
mounts = getmntinfo(&mntbufp, MNT_WAIT); /* NOT THREAD SAFE! */
for (i = 0; i < mounts; i++)
{
char *dev = mntbufp[i].f_mntfromname;
char *mnt = mntbufp[i].f_mntonname;
if (strncmp(dev, devPrefix, prefixLen) != 0) /* a virtual device? */
continue;
dev += prefixLen;
if (darwinIsMountedDisc(dev, masterPort))
cb(data, mnt);
} /* for */
} /* __PHYSFS_platformDetectAvailableCDs */
static char *convertCFString(CFStringRef cfstr)
{
CFIndex len = CFStringGetMaximumSizeForEncoding(CFStringGetLength(cfstr),
kCFStringEncodingUTF8) + 1;
char *retval = (char *) allocator.Malloc(len);
BAIL_IF_MACRO(retval == NULL, ERR_OUT_OF_MEMORY, NULL);
if (CFStringGetCString(cfstr, retval, len, kCFStringEncodingUTF8))
{
/* shrink overallocated buffer if possible... */
CFIndex newlen = strlen(retval) + 1;
if (newlen < len)
{
void *ptr = allocator.Realloc(retval, newlen);
if (ptr != NULL)
retval = (char *) ptr;
} /* if */
} /* if */
else /* probably shouldn't fail, but just in case... */
{
allocator.Free(retval);
BAIL_MACRO(ERR_OUT_OF_MEMORY, NULL);
} /* else */
return(retval);
} /* convertCFString */
char *__PHYSFS_platformCalcBaseDir(const char *argv0)
{
ProcessSerialNumber psn = { 0, kCurrentProcess };
FSRef fsref;
CFRange cfrange;
CFURLRef cfurl = NULL;
CFStringRef cfstr = NULL;
CFMutableStringRef cfmutstr = NULL;
char *retval = NULL;
BAIL_IF_MACRO(GetProcessBundleLocation(&psn, &fsref) != noErr, NULL, NULL);
cfurl = CFURLCreateFromFSRef(cfallocator, &fsref);
BAIL_IF_MACRO(cfurl == NULL, NULL, NULL);
cfstr = CFURLCopyFileSystemPath(cfurl, kCFURLPOSIXPathStyle);
CFRelease(cfurl);
BAIL_IF_MACRO(cfstr == NULL, NULL, NULL);
cfmutstr = CFStringCreateMutableCopy(cfallocator, 0, cfstr);
CFRelease(cfstr);
BAIL_IF_MACRO(cfmutstr == NULL, NULL, NULL);
/* Find last dirsep so we can chop the binary's filename from the path. */
cfrange = CFStringFind(cfmutstr, CFSTR("/"), kCFCompareBackwards);
if (cfrange.location == kCFNotFound)
{
assert(0); /* shouldn't ever hit this... */
CFRelease(cfmutstr);
return(NULL);
} /* if */
/* chop the "/exename" from the end of the path string... */
cfrange.length = CFStringGetLength(cfmutstr) - cfrange.location;
CFStringDelete(cfmutstr, cfrange);
/* If we're an Application Bundle, chop everything but the base. */
cfrange = CFStringFind(cfmutstr, CFSTR("/Contents/MacOS"),
kCFCompareCaseInsensitive |
kCFCompareBackwards |
kCFCompareAnchored);
if (cfrange.location != kCFNotFound)
CFStringDelete(cfmutstr, cfrange); /* chop that, too. */
retval = convertCFString(cfmutstr);
CFRelease(cfmutstr);
return(retval); /* whew. */
} /* __PHYSFS_platformCalcBaseDir */
/* !!! FIXME */
#define osxerr(x) x
char *__PHYSFS_platformRealPath(const char *path)
{
/* The symlink and relative path resolving happens in FSPathMakeRef() */
FSRef fsref;
CFURLRef cfurl = NULL;
CFStringRef cfstr = NULL;
char *retval = NULL;
OSStatus rc = osxerr(FSPathMakeRef((UInt8 *) path, &fsref, NULL));
BAIL_IF_MACRO(rc != noErr, NULL, NULL);
/* Now get it to spit out a full path. */
cfurl = CFURLCreateFromFSRef(cfallocator, &fsref);
BAIL_IF_MACRO(cfurl == NULL, ERR_OUT_OF_MEMORY, NULL);
cfstr = CFURLCopyFileSystemPath(cfurl, kCFURLPOSIXPathStyle);
CFRelease(cfurl);
BAIL_IF_MACRO(cfstr == NULL, ERR_OUT_OF_MEMORY, NULL);
retval = convertCFString(cfstr);
CFRelease(cfstr);
return(retval);
} /* __PHYSFS_platformRealPath */
char *__PHYSFS_platformCurrentDir(void)
{
return(__PHYSFS_platformRealPath(".")); /* let CFURL sort it out. */
} /* __PHYSFS_platformCurrentDir */
/* Platform allocator uses default CFAllocator at PHYSFS_init() time. */
static CFAllocatorRef cfallocdef = NULL;
static int macosxAllocatorInit(void)
{
int retval = 0;
cfallocdef = CFAllocatorGetDefault();
retval = (cfallocdef != NULL);
if (retval)
CFRetain(cfallocdef);
return(retval);
} /* macosxAllocatorInit */
static void macosxAllocatorDeinit(void)
{
if (cfallocdef != NULL)
{
CFRelease(cfallocdef);
cfallocdef = NULL;
} /* if */
} /* macosxAllocatorDeinit */
static void *macosxAllocatorMalloc(PHYSFS_uint64 s)
{
BAIL_IF_MACRO(__PHYSFS_ui64FitsAddressSpace(s), ERR_OUT_OF_MEMORY, NULL);
return(CFAllocatorAllocate(cfallocdef, (CFIndex) s, 0));
} /* macosxAllocatorMalloc */
static void *macosxAllocatorRealloc(void *ptr, PHYSFS_uint64 s)
{
BAIL_IF_MACRO(__PHYSFS_ui64FitsAddressSpace(s), ERR_OUT_OF_MEMORY, NULL);
return(CFAllocatorReallocate(cfallocdef, ptr, (CFIndex) s, 0));
} /* macosxAllocatorRealloc */
static void macosxAllocatorFree(void *ptr)
{
CFAllocatorDeallocate(cfallocdef, ptr);
} /* macosxAllocatorFree */
int __PHYSFS_platformSetDefaultAllocator(PHYSFS_Allocator *a)
{
allocator.Init = macosxAllocatorInit;
allocator.Deinit = macosxAllocatorDeinit;
allocator.Malloc = macosxAllocatorMalloc;
allocator.Realloc = macosxAllocatorRealloc;
allocator.Free = macosxAllocatorFree;
return(1); /* return non-zero: we're supplying custom allocator. */
} /* __PHYSFS_platformSetDefaultAllocator */
PHYSFS_uint64 __PHYSFS_platformGetThreadID(void)
{
return( (PHYSFS_uint64) ((size_t) MPCurrentTaskID()) );
} /* __PHYSFS_platformGetThreadID */
void *__PHYSFS_platformCreateMutex(void)
{
MPCriticalRegionID m = NULL;
if (osxerr(MPCreateCriticalRegion(&m)) != noErr)
return NULL;
return m;
} /* __PHYSFS_platformCreateMutex */
void __PHYSFS_platformDestroyMutex(void *mutex)
{
MPCriticalRegionID m = (MPCriticalRegionID) mutex;
MPDeleteCriticalRegion(m);
} /* __PHYSFS_platformDestroyMutex */
int __PHYSFS_platformGrabMutex(void *mutex)
{
MPCriticalRegionID m = (MPCriticalRegionID) mutex;
if (MPEnterCriticalRegion(m, kDurationForever) != noErr)
return(0);
return(1);
} /* __PHYSFS_platformGrabMutex */
void __PHYSFS_platformReleaseMutex(void *mutex)
{
MPCriticalRegionID m = (MPCriticalRegionID) mutex;
MPExitCriticalRegion(m);
} /* __PHYSFS_platformReleaseMutex */
#endif /* PHYSFS_PLATFORM_MACOSX */
/* end of macosx.c ... */
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