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CFPlatform.c
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/*
* Copyright (c) 2008-2012 Brent Fulgham <bfulgham@gmail.org>. All rights reserved.
* Copyright (c) 2009 Grant Erickson <gerickson@nuovations.com>. All rights reserved.
*
* This source code is a modified version of the CoreFoundation sources released by Apple Inc. under
* the terms of the APSL version 2.0 (see below).
*
* For information about changes from the original Apple source release can be found by reviewing the
* source control system for the project at https://sourceforge.net/svn/?group_id=246198.
*
* The original license information is as follows:
*
* Copyright (c) 2011 Apple Inc. All rights reserved.
*
* @APPLE_LICENSE_HEADER_START@
*
* This file contains Original Code and/or Modifications of Original Code
* as defined in and that are subject to the Apple Public Source License
* Version 2.0 (the 'License'). You may not use this file except in
* compliance with the License. Please obtain a copy of the License at
* http://www.opensource.apple.com/apsl/ and read it before using this
* file.
*
* The Original Code and all software distributed under the License are
* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
* Please see the License for the specific language governing rights and
* limitations under the License.
*
* @APPLE_LICENSE_HEADER_END@
*/
/* CFPlatform.c
Copyright (c) 1999-2011, Apple Inc. All rights reserved.
Responsibility: Tony Parker
*/
#include <CoreFoundation/CoreFoundation_Prefix.h>
#include "CFInternal.h"
#include <CoreFoundation/CFPriv.h>
#include <fcntl.h>
#if DEPLOYMENT_TARGET_MACOSX || DEPLOYMENT_TARGET_EMBEDDED
#include <stdlib.h>
#include <sys/stat.h>
#include <string.h>
#include <unistd.h>
#include <pwd.h>
#include <crt_externs.h>
#include <mach-o/dyld.h>
#elif DEPLOYMENT_TARGET_LINUX || DEPLOYMENT_TARGET_FREEBSD
#include <pwd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#endif
#if DEPLOYMENT_TARGET_WINDOWS
#include <shellapi.h>
#include <shlobj.h>
#include <WinIoCtl.h>
#define getcwd _NS_getcwd
#define strdup _strdup
#endif
#if DEPLOYMENT_TARGET_MACOSX || DEPLOYMENT_TARGET_EMBEDDED || DEPLOYMENT_TARGET_WINDOWS_SYNC
#define kCFPlatformInterfaceStringEncoding kCFStringEncodingUTF8
#else
#define kCFPlatformInterfaceStringEncoding CFStringGetSystemEncoding()
#endif
static CFStringRef _CFUserName(void);
#if DEPLOYMENT_TARGET_MACOSX || DEPLOYMENT_TARGET_EMBEDDED
// CoreGraphics and LaunchServices are only projects (1 Dec 2006) that use these
char **_CFArgv(void) { return *_NSGetArgv(); }
int _CFArgc(void) { return *_NSGetArgc(); }
#endif
__private_extern__ Boolean _CFGetCurrentDirectory(char *path, int maxlen) {
return getcwd(path, maxlen) != NULL;
}
#if SUPPORT_CFM
static Boolean __CFIsCFM = false;
// If called super early, we just return false
__private_extern__ Boolean _CFIsCFM(void) {
return __CFIsCFM;
}
#endif
#if DEPLOYMENT_TARGET_WINDOWS
#define PATH_SEP '\\'
#else
#define PATH_SEP '/'
#endif
#if DEPLOYMENT_TARGET_WINDOWS
// Returns the path to the CF DLL, which we can then use to find resources like char sets
bool bDllPathCached = false;
__private_extern__ const wchar_t *_CFDLLPath(void) {
static wchar_t cachedPath[MAX_PATH+1];
if (!bDllPathCached) {
#ifdef _DEBUG
// might be nice to get this from the project file at some point
wchar_t *DLLFileName = L"CFLite_debug.dll"; //L"CoreFoundation_debug.dll";
#else
wchar_t *DLLFileName = L"CFLite.dll"; //L"CoreFoundation.dll";
#endif
HMODULE ourModule = GetModuleHandleW(DLLFileName);
CFAssert(ourModule, __kCFLogAssertion, "GetModuleHandle failed");
DWORD wResult = GetModuleFileNameW(ourModule, cachedPath, MAX_PATH+1);
CFAssert1(wResult > 0, __kCFLogAssertion, "GetModuleFileName failed: %d", GetLastError());
CFAssert1(wResult < MAX_PATH+1, __kCFLogAssertion, "GetModuleFileName result truncated: %s", cachedPath);
// strip off last component, the DLL name
CFIndex idx;
for (idx = wResult - 1; idx; idx--) {
if ('\\' == cachedPath[idx]) {
cachedPath[idx] = '\0';
break;
}
}
bDllPathCached = true;
}
return cachedPath;
}
#endif
static const char *__CFProcessPath = NULL;
static const char *__CFprogname = NULL;
const char **_CFGetProgname(void) {
if (!__CFprogname)
_CFProcessPath(); // sets up __CFprogname as a side-effect
return &__CFprogname;
}
const char **_CFGetProcessPath(void) {
if (!__CFProcessPath)
_CFProcessPath(); // sets up __CFProcessPath as a side-effect
return &__CFProcessPath;
}
#if DEPLOYMENT_TARGET_WINDOWS
const char *_CFProcessPath(void) {
if (__CFProcessPath) return __CFProcessPath;
wchar_t buf[CFMaxPathSize] = {0};
DWORD rlen = GetModuleFileNameW(NULL, buf, sizeof(buf) / sizeof(buf[0]));
if (0 < rlen) {
char asciiBuf[CFMaxPathSize] = {0};
int res = WideCharToMultiByte(CP_UTF8, 0, buf, rlen, asciiBuf, sizeof(asciiBuf) / sizeof(asciiBuf[0]), NULL, NULL);
if (0 < res) {
__CFProcessPath = strdup(asciiBuf);
__CFprogname = strrchr(__CFProcessPath, PATH_SEP);
__CFprogname = (__CFprogname ? __CFprogname + 1 : __CFProcessPath);
}
}
if (!__CFProcessPath) {
__CFProcessPath = "";
__CFprogname = __CFProcessPath;
}
return __CFProcessPath;
}
#endif
#if DEPLOYMENT_TARGET_MACOSX || DEPLOYMENT_TARGET_EMBEDDED
const char *_CFProcessPath(void) {
if (__CFProcessPath) return __CFProcessPath;
#if DEPLOYMENT_TARGET_MACOSX
if (!issetugid()) {
const char *path = (char *)__CFgetenv("CFProcessPath");
if (path) {
__CFProcessPath = strdup(path);
__CFprogname = strrchr(__CFProcessPath, PATH_SEP);
__CFprogname = (__CFprogname ? __CFprogname + 1 : __CFProcessPath);
return __CFProcessPath;
}
}
#endif
uint32_t size = CFMaxPathSize;
char buffer[size];
if (0 == _NSGetExecutablePath(buffer, &size)) {
#if SUPPORT_CFM
size_t len = strlen(buffer);
if (12 <= len && 0 == strcmp("LaunchCFMApp", buffer + len - 12)) {
struct stat exec, lcfm;
const char *launchcfm = "/System/Library/Frameworks/Carbon.framework/Versions/Current/Support/LaunchCFMApp";
if (0 == stat(launchcfm, &lcfm) && 0 == stat(buffer, &exec) && (lcfm.st_dev == exec.st_dev) && (lcfm.st_ino == exec.st_ino)) {
// Executable is LaunchCFMApp, take special action
__CFIsCFM = true;
if ((*_NSGetArgv())[1] && '/' == *((*_NSGetArgv())[1])) {
strlcpy(buffer, (*_NSGetArgv())[1], sizeof(buffer));
}
}
}
#endif
__CFProcessPath = strdup(buffer);
__CFprogname = strrchr(__CFProcessPath, PATH_SEP);
__CFprogname = (__CFprogname ? __CFprogname + 1 : __CFProcessPath);
}
if (!__CFProcessPath) {
__CFProcessPath = "";
__CFprogname = __CFProcessPath;
}
return __CFProcessPath;
}
#endif
#if DEPLOYMENT_TARGET_LINUX
#include <unistd.h>
const char *_CFProcessPath(void) {
if (__CFProcessPath) return __CFProcessPath;
char buf[CFMaxPathSize + 1];
ssize_t res = readlink("/proc/self/exe", buf, CFMaxPathSize);
if (res > 0) {
// null terminate, readlink does not
buf[res] = 0;
__CFProcessPath = strdup(buf);
__CFprogname = strrchr(__CFProcessPath, PATH_SEP);
__CFprogname = (__CFprogname ? __CFprogname + 1 : __CFProcessPath);
} else {
__CFProcessPath = "";
__CFprogname = __CFProcessPath;
}
return __CFProcessPath;
}
#endif
__private_extern__ CFStringRef _CFProcessNameString(void) {
static CFStringRef __CFProcessNameString = NULL;
if (!__CFProcessNameString) {
const char *processName = *_CFGetProgname();
if (!processName) processName = "";
CFStringRef newStr = CFStringCreateWithCString(kCFAllocatorSystemDefault, processName, kCFPlatformInterfaceStringEncoding);
if (!OSAtomicCompareAndSwapPtrBarrier(NULL, (void *) newStr, (void * volatile *)& __CFProcessNameString)) {
CFRelease(newStr); // someone else made the assignment, so just release the extra string.
}
}
return __CFProcessNameString;
}
static CFStringRef __CFUserName = NULL;
static CFSpinLock_t __CFPlatformCacheLock = CFSpinLockInit;
#if DEPLOYMENT_TARGET_MACOSX || DEPLOYMENT_TARGET_EMBEDDED || defined(__svr4__) || defined(__hpux__) || DEPLOYMENT_TARGET_LINUX || DEPLOYMENT_TARGET_FREEBSD
#include <pwd.h>
static CFURLRef __CFHomeDirectory = NULL;
static uint32_t __CFEUID = -1;
static uint32_t __CFUID = -1;
static CFURLRef _CFCopyHomeDirURLForUser(struct passwd *upwd) { // __CFPlatformCacheLock must be locked on entry and will be on exit
CFURLRef home = NULL;
if (!issetugid()) {
const char *path = __CFgetenv("CFFIXED_USER_HOME");
if (path) {
home = CFURLCreateFromFileSystemRepresentation(kCFAllocatorSystemDefault, (uint8_t *)path, strlen(path), true);
}
}
if (!home) {
if (upwd && upwd->pw_dir) {
home = CFURLCreateFromFileSystemRepresentation(kCFAllocatorSystemDefault, (uint8_t *)upwd->pw_dir, strlen(upwd->pw_dir), true);
}
}
return home;
}
static void _CFUpdateUserInfo(void) { // __CFPlatformCacheLock must be locked on entry and will be on exit
struct passwd *upwd;
__CFEUID = geteuid();
__CFUID = getuid();
if (__CFHomeDirectory) CFRelease(__CFHomeDirectory);
__CFHomeDirectory = NULL;
if (__CFUserName) CFRelease(__CFUserName);
__CFUserName = NULL;
upwd = getpwuid(__CFEUID ? __CFEUID : __CFUID);
__CFHomeDirectory = _CFCopyHomeDirURLForUser(upwd);
if (!__CFHomeDirectory) {
const char *cpath = __CFgetenv("HOME");
if (cpath) {
__CFHomeDirectory = CFURLCreateFromFileSystemRepresentation(kCFAllocatorSystemDefault, (uint8_t *)cpath, strlen(cpath), true);
}
}
// This implies that UserManager stores directory info in CString
// rather than FileSystemRep. Perhaps this is wrong & we should
// expect NeXTSTEP encodings. A great test of our localized system would
// be to have a user "O-umlat z e r". XXX
if (upwd && upwd->pw_name) {
__CFUserName = CFStringCreateWithCString(kCFAllocatorSystemDefault, upwd->pw_name, kCFPlatformInterfaceStringEncoding);
} else {
const char *cuser = __CFgetenv("USER");
if (cuser)
__CFUserName = CFStringCreateWithCString(kCFAllocatorSystemDefault, cuser, kCFPlatformInterfaceStringEncoding);
}
}
#endif
static CFURLRef _CFCreateHomeDirectoryURLForUser(CFStringRef uName) { // __CFPlatformCacheLock must be locked on entry and will be on exit
#if DEPLOYMENT_TARGET_MACOSX || DEPLOYMENT_TARGET_EMBEDDED || defined(__svr4__) || defined(__hpux__) || DEPLOYMENT_TARGET_LINUX || DEPLOYMENT_TARGET_FREEBSD
if (!uName) {
if (geteuid() != __CFEUID || getuid() != __CFUID || !__CFHomeDirectory)
_CFUpdateUserInfo();
if (__CFHomeDirectory) CFRetain(__CFHomeDirectory);
return __CFHomeDirectory;
} else {
struct passwd *upwd = NULL;
char buf[128], *user;
SInt32 len = CFStringGetLength(uName), size = CFStringGetMaximumSizeForEncoding(len, kCFPlatformInterfaceStringEncoding);
CFIndex usedSize;
if (size < 127) {
user = buf;
} else {
user = (char*)CFAllocatorAllocate(kCFAllocatorSystemDefault, size+1, 0);
if (__CFOASafe) __CFSetLastAllocationEventName(user, "CFUtilities (temp)");
}
if (CFStringGetBytes(uName, CFRangeMake(0, len), kCFPlatformInterfaceStringEncoding, 0, true, (uint8_t *)user, size, &usedSize) == len) {
user[usedSize] = '\0';
upwd = getpwnam(user);
}
if (buf != user) {
CFAllocatorDeallocate(kCFAllocatorSystemDefault, user);
}
return _CFCopyHomeDirURLForUser(upwd);
}
#elif DEPLOYMENT_TARGET_WINDOWS
// This code can only get the directory for the current user
if (uName && !CFEqual(uName, _CFUserName())) {
CFLog(kCFLogLevelError, CFSTR("CFCopyHomeDirectoryURLForUser(): Unable to get home directory for other user"));
return NULL;
}
CFURLRef retVal = NULL;
CFIndex len = 0;
CFStringRef str = NULL;
UniChar pathChars[MAX_PATH];
if (S_OK == SHGetFolderPathW(NULL, CSIDL_PROFILE, NULL, SHGFP_TYPE_CURRENT, (wchar_t *)pathChars)) {
len = (CFIndex)wcslen((wchar_t *)pathChars);
str = CFStringCreateWithCharacters(kCFAllocatorSystemDefault, pathChars, len);
retVal = CFURLCreateWithFileSystemPath(kCFAllocatorSystemDefault, str, kCFURLWindowsPathStyle, true);
CFRelease(str);
}
if (!retVal) {
// Fall back to environment variable, but this will not be unicode compatible
const char *cpath = __CFgetenv("HOMEPATH");
const char *cdrive = __CFgetenv("HOMEDRIVE");
if (cdrive && cpath) {
char fullPath[CFMaxPathSize];
strlcpy(fullPath, cdrive, sizeof(fullPath));
strlcat(fullPath, cpath, sizeof(fullPath));
str = CFStringCreateWithCString(kCFAllocatorSystemDefault, fullPath, kCFPlatformInterfaceStringEncoding);
retVal = CFURLCreateWithFileSystemPath(kCFAllocatorSystemDefault, str, kCFURLWindowsPathStyle, true);
CFRelease(str);
}
}
if (!retVal) {
// Last resort: We have to get "some" directory location, so fall-back to the processes current directory.
UniChar currDir[MAX_PATH];
DWORD dwChars = GetCurrentDirectoryW(MAX_PATH + 1, (wchar_t *)currDir);
if (dwChars > 0) {
len = (CFIndex)wcslen((wchar_t *)currDir);
str = CFStringCreateWithCharacters(kCFAllocatorDefault, currDir, len);
retVal = CFURLCreateWithFileSystemPath(NULL, str, kCFURLWindowsPathStyle, true);
CFRelease(str);
}
}
// We could do more here (as in KB Article Q101507). If that article is to be believed, we should only run into this case on Win95, or through user error.
CFStringRef testPath = CFURLCopyFileSystemPath(retVal, kCFURLWindowsPathStyle);
if (CFStringGetLength(testPath) == 0) {
CFRelease(retVal);
retVal = NULL;
}
if (testPath) CFRelease(testPath);
return retVal;
#else
#error Dont know how to compute users home directories on this platform
#endif
}
static CFStringRef _CFUserName(void) { // __CFPlatformCacheLock must be locked on entry and will be on exit
#if DEPLOYMENT_TARGET_MACOSX || DEPLOYMENT_TARGET_EMBEDDED || DEPLOYMENT_TARGET_LINUX || DEPLOYMENT_TARGET_FREEBSD
if (geteuid() != __CFEUID || getuid() != __CFUID)
_CFUpdateUserInfo();
#elif DEPLOYMENT_TARGET_WINDOWS
if (!__CFUserName) {
wchar_t username[1040];
DWORD size = 1040;
username[0] = 0;
if (GetUserNameW(username, &size)) {
// discount the extra NULL by decrementing the size
__CFUserName = CFStringCreateWithCharacters(kCFAllocatorSystemDefault, (const UniChar *)username, size - 1);
} else {
const char *cname = __CFgetenv("USERNAME");
if (cname)
__CFUserName = CFStringCreateWithCString(kCFAllocatorSystemDefault, cname, kCFPlatformInterfaceStringEncoding);
}
}
#else
#error Dont know how to compute user name on this platform
#endif
if (!__CFUserName)
__CFUserName = (CFStringRef)CFRetain(CFSTR(""));
return __CFUserName;
}
#define CFMaxHostNameLength 256
#define CFMaxHostNameSize (CFMaxHostNameLength+1)
__private_extern__ CFStringRef _CFStringCreateHostName(void) {
char myName[CFMaxHostNameSize];
// return @"" instead of nil a la CFUserName() and Ali Ozer
if (0 != gethostname(myName, CFMaxHostNameSize)) myName[0] = '\0';
return CFStringCreateWithCString(kCFAllocatorSystemDefault, myName, kCFPlatformInterfaceStringEncoding);
}
/* These are sanitized versions of the above functions. We might want to eliminate the above ones someday.
These can return NULL.
*/
CF_EXPORT CFStringRef CFGetUserName(void) {
CFStringRef result = NULL;
__CFSpinLock(&__CFPlatformCacheLock);
result = CFStringCreateCopy(kCFAllocatorSystemDefault, _CFUserName());
__CFSpinUnlock(&__CFPlatformCacheLock);
return result;
}
CF_EXPORT CFStringRef CFCopyUserName(void) {
CFStringRef result = NULL;
__CFSpinLock(&__CFPlatformCacheLock);
result = CFStringCreateCopy(kCFAllocatorSystemDefault, _CFUserName());
__CFSpinUnlock(&__CFPlatformCacheLock);
return result;
}
CF_EXPORT CFURLRef CFCopyHomeDirectoryURLForUser(CFStringRef uName) {
CFURLRef result = NULL;
__CFSpinLock(&__CFPlatformCacheLock);
result = _CFCreateHomeDirectoryURLForUser(uName);
__CFSpinUnlock(&__CFPlatformCacheLock);
return result;
}
#undef CFMaxHostNameLength
#undef CFMaxHostNameSize
#if DEPLOYMENT_TARGET_WINDOWS
CF_INLINE CFIndex strlen_UniChar(const UniChar* p) {
CFIndex result = 0;
while ((*p++) != 0)
++result;
return result;
}
//#include <shfolder.h>
/*
* _CFCreateApplicationRepositoryPath returns the path to the application's
* repository in a CFMutableStringRef. The path returned will be:
* <nFolder_path>\Apple Computer\<bundle_name>\
* or if the bundle name cannot be obtained:
* <nFolder_path>\Apple Computer\
* where nFolder_path is obtained by calling SHGetFolderPath with nFolder
* (for example, with CSIDL_APPDATA or CSIDL_LOCAL_APPDATA).
*
* The CFMutableStringRef result must be released by the caller.
*
* If anything fails along the way, the result will be NULL.
*/
CF_EXPORT CFMutableStringRef _CFCreateApplicationRepositoryPath(CFAllocatorRef alloc, int nFolder) {
CFMutableStringRef result = NULL;
UniChar szPath[MAX_PATH];
// get the current path to the data repository: CSIDL_APPDATA (roaming) or CSIDL_LOCAL_APPDATA (nonroaming)
if (S_OK == SHGetFolderPathW(NULL, nFolder, NULL, 0, (wchar_t *) szPath)) {
CFStringRef directoryPath;
// make it a CFString
directoryPath = CFStringCreateWithCharacters(alloc, szPath, strlen_UniChar(szPath));
if (directoryPath) {
CFBundleRef bundle;
CFStringRef bundleName;
CFStringRef completePath;
// attempt to get the bundle name
bundle = CFBundleGetMainBundle();
if (bundle) {
bundleName = (CFStringRef)CFBundleGetValueForInfoDictionaryKey(bundle, kCFBundleNameKey);
}
else {
bundleName = NULL;
}
if (bundleName) {
// the path will be "<directoryPath>\Apple Computer\<bundleName>\" if there is a bundle name
completePath = CFStringCreateWithFormat(alloc, NULL, CFSTR("%@\\Apple Computer\\%@\\"), directoryPath, bundleName);
}
else {
// or "<directoryPath>\Apple Computer\" if there is no bundle name.
completePath = CFStringCreateWithFormat(alloc, NULL, CFSTR("%@\\Apple Computer\\"), directoryPath);
}
CFRelease(directoryPath);
// make a mutable copy to return
if (completePath) {
result = CFStringCreateMutableCopy(alloc, 0, completePath);
CFRelease(completePath);
}
}
}
return ( result );
}
#endif
#pragma mark -
#pragma mark Thread Functions
#if DEPLOYMENT_TARGET_WINDOWS
// This code from here:
// http://msdn.microsoft.com/en-us/library/xcb2z8hs.aspx
const DWORD MS_VC_EXCEPTION=0x406D1388;
#pragma pack(push,8)
typedef struct tagTHREADNAME_INFO
{
DWORD dwType; // Must be 0x1000.
LPCSTR szName; // Pointer to name (in user addr space).
DWORD dwThreadID; // Thread ID (-1=caller thread).
DWORD dwFlags; // Reserved for future use, must be zero.
} THREADNAME_INFO;
#pragma pack(pop)
CF_EXPORT void _NS_pthread_setname_np(const char *name) {
THREADNAME_INFO info;
info.dwType = 0x1000;
info.szName = name;
info.dwThreadID = GetCurrentThreadId();
info.dwFlags = 0;
__try
{
RaiseException( MS_VC_EXCEPTION, 0, sizeof(info)/sizeof(ULONG_PTR), (ULONG_PTR*)&info );
}
__except(EXCEPTION_EXECUTE_HANDLER)
{
}
}
static pthread_t __initialPthread = { NULL, 0 };
CF_EXPORT int _NS_pthread_main_np() {
pthread_t me = pthread_self();
if (NULL == __initialPthread.p) {
__initialPthread.p = me.p;
__initialPthread.x = me.x;
}
return (pthread_equal(__initialPthread, me));
}
#endif
#pragma mark -
#pragma mark Thread Local Data
// If slot >= CF_TSD_MAX_SLOTS, the SPI functions will crash at NULL + slot address.
// If thread data has been torn down, these functions should crash on CF_TSD_BAD_PTR + slot address.
#define CF_TSD_MAX_SLOTS 70
#if DEPLOYMENT_TARGET_MACOSX || DEPLOYMENT_TARGET_EMBEDDED
#define CF_TSD_KEY 55
#endif
// Windows and Linux, not sure how many times the destructor could get called; CF_TSD_MAX_DESTRUCTOR_CALLS could be 1
#define CF_TSD_BAD_PTR ((void *)0x1000)
typedef void (*tsdDestructor)(void *);
// Data structure to hold TSD data, cleanup functions for each
typedef struct __CFTSDTable {
uint32_t destructorCount;
uintptr_t data[CF_TSD_MAX_SLOTS];
tsdDestructor destructors[CF_TSD_MAX_SLOTS];
} __CFTSDTable;
static void __CFTSDFinalize(void *arg);
#if DEPLOYMENT_TARGET_WINDOWS
static DWORD __CFTSDIndexKey = 0xFFFFFFFF;
// Called from CFRuntime's startup code, on Windows only
__private_extern__ void __CFTSDWindowsInitialize() {
__CFTSDIndexKey = TlsAlloc();
}
// Called from CFRuntime's cleanup code, on Windows only
__private_extern__ void __CFTSDWindowsCleanup() {
TlsFree(__CFTSDIndexKey);
}
// Called for each thread as it exits, on Windows only
__private_extern__ void __CFFinalizeWindowsThreadData() {
// Normally, this should call the finalizer several times to emulate the behavior of pthreads on Windows. However, a few bugs keep us from doing this:
// <rdar://problem/8989063> REGRESSION(CF-610-CF-611): Crash closing Safari in BonjourDB destructor (Windows)
// <rdar://problem/9326814> SyncUIHandler crashes after conflict is resolved and we do SyncNow
// and a bug in dispatch keeps us from using pthreadsWin32 directly, because it does not deal with the case of a dispatch_async happening during process exit (it attempts to create a thread, but that is illegal on Win32 and causes a hang).
// So instead we just finalize once, which is the behavior pre-Airwolf anyway
__CFTSDFinalize(TlsGetValue(__CFTSDIndexKey));
}
#endif
#if DEPLOYMENT_TARGET_LINUX
static pthread_key_t __CFTSDIndexKey;
// Called from CFRuntime's startup code, on Linux only
__private_extern__ void __CFTSDLinuxInitialize() {
(void)pthread_key_create(&__CFTSDIndexKey, __CFTSDFinalize);
}
#endif
static void __CFTSDSetSpecific(void *arg) {
#if DEPLOYMENT_TARGET_MACOSX || DEPLOYMENT_TARGET_EMBEDDED
pthread_setspecific(CF_TSD_KEY, arg);
#elif DEPLOYMENT_TARGET_LINUX
pthread_setspecific(__CFTSDIndexKey, arg);
#elif DEPLOYMENT_TARGET_WINDOWS
TlsSetValue(__CFTSDIndexKey, arg);
#endif
}
static void *__CFTSDGetSpecific() {
#if DEPLOYMENT_TARGET_MACOSX || DEPLOYMENT_TARGET_EMBEDDED
return pthread_getspecific(CF_TSD_KEY);
#elif DEPLOYMENT_TARGET_LINUX
return pthread_getspecific(__CFTSDIndexKey);
#elif DEPLOYMENT_TARGET_WINDOWS
return TlsGetValue(__CFTSDIndexKey);
#endif
}
static void __CFTSDFinalize(void *arg) {
// Set our TSD so we're called again by pthreads. It will call the destructor 5 times as long as a value is set in the thread specific data. We handle each case below.
__CFTSDSetSpecific(arg);
if (!arg || arg == CF_TSD_BAD_PTR) {
// We've already been destroyed. The call above set the bad pointer again. Now we just return.
return;
}
__CFTSDTable *table = (__CFTSDTable *)arg;
table->destructorCount++;
// On 1st, 2nd, 3rd, 4th calls, invoke destructor
// Note that invocation of the destructor may cause a value to be set again in the per-thread data slots. The destructor count and destructors are preserved.
// This logic is basically the same as what pthreads does. We just skip the 'created' flag.
#if COCOA_ARR0
uintptr_t pool = _CFAutoreleasePoolPush();
#endif
for (int32_t i = 0; i < CF_TSD_MAX_SLOTS; i++) {
if (table->data[i] && table->destructors[i]) {
uintptr_t old = table->data[i];
table->data[i] = (uintptr_t)NULL;
table->destructors[i]((void *)(old));
}
}
#if COCOA_ARR0
_CFAutoreleasePoolPop(pool);
#endif
if (table->destructorCount == PTHREAD_DESTRUCTOR_ITERATIONS - 1) { // On 4th call, destroy our data
free(table);
// Now if the destructor is called again we will take the shortcut at the beginning of this function.
__CFTSDSetSpecific(CF_TSD_BAD_PTR);
return;
}
}
#if DEPLOYMENT_TARGET_MACOSX || DEPLOYMENT_TARGET_EMBEDDED
extern int pthread_key_init_np(int, void (*)(void *));
#endif
// Get or initialize a thread local storage. It is created on demand.
static __CFTSDTable *__CFTSDGetTable() {
__CFTSDTable *table = (__CFTSDTable *)__CFTSDGetSpecific();
// Make sure we're not setting data again after destruction.
if (table == CF_TSD_BAD_PTR) {
return NULL;
}
// Create table on demand
if (!table) {
// This memory is freed in the finalize function
table = (__CFTSDTable *)calloc(1, sizeof(__CFTSDTable));
// Windows and Linux have created the table already, we need to initialize it here for other platforms. On Windows, the cleanup function is called by DllMain when a thread exits. On Linux the destructor is set at init time.
#if DEPLOYMENT_TARGET_MACOSX || DEPLOYMENT_TARGET_EMBEDDED
pthread_key_init_np(CF_TSD_KEY, __CFTSDFinalize);
#endif
__CFTSDSetSpecific(table);
}
return table;
}
// For the use of CF and Foundation only
CF_EXPORT void *_CFGetTSD(uint32_t slot) {
if (slot > CF_TSD_MAX_SLOTS) {
_CFLogSimple(kCFLogLevelError, "Error: TSD slot %d out of range (get)", slot);
HALT;
}
__CFTSDTable *table = __CFTSDGetTable();
if (!table) {
// Someone is getting TSD during thread destruction. The table is gone, so we can't get any data anymore.
_CFLogSimple(kCFLogLevelWarning, "Warning: TSD slot %d retrieved but the thread data has already been torn down.", slot);
return NULL;
}
uintptr_t *slots = (uintptr_t *)(table->data);
return (void *)slots[slot];
}
// For the use of CF and Foundation only
CF_EXPORT void *_CFSetTSD(uint32_t slot, void *newVal, tsdDestructor destructor) {
if (slot > CF_TSD_MAX_SLOTS) {
_CFLogSimple(kCFLogLevelError, "Error: TSD slot %d out of range (set)", slot);
HALT;
}
__CFTSDTable *table = __CFTSDGetTable();
if (!table) {
// Someone is setting TSD during thread destruction. The table is gone, so we can't get any data anymore.
_CFLogSimple(kCFLogLevelWarning, "Warning: TSD slot %d set but the thread data has already been torn down.", slot);
return NULL;
}
void *oldVal = (void *)table->data[slot];
table->data[slot] = (uintptr_t)newVal;
table->destructors[slot] = destructor;
return oldVal;
}
#pragma mark -
#pragma mark Windows Wide to UTF8 and UTF8 to Wide
#if DEPLOYMENT_TARGET_WINDOWS
/* On Windows, we want to use UTF-16LE for path names to get full unicode support. Internally, however, everything remains in UTF-8 representation. These helper functions stand between CF and the Microsoft CRT to ensure that we are using the right representation on both sides. */
#include <sys/stat.h>
#include <share.h>
// Creates a buffer of wchar_t to hold a UTF16LE version of the UTF8 str passed in. Caller must free the buffer when done. If resultLen is non-NULL, it is filled out with the number of characters in the string.
static wchar_t *createWideFileSystemRepresentation(const char *str, CFIndex *resultLen) {
// Get the real length of the string in UTF16 characters
CFStringRef cfStr = CFStringCreateWithCString(kCFAllocatorSystemDefault, str, kCFStringEncodingUTF8);
CFIndex strLen = CFStringGetLength(cfStr);
// Allocate a wide buffer to hold the converted string, including space for a NULL terminator
wchar_t *wideBuf = (wchar_t *)malloc((strLen + 1) * sizeof(wchar_t));
// Copy the string into the buffer and terminate
CFStringGetCharacters(cfStr, CFRangeMake(0, strLen), (UniChar *)wideBuf);
wideBuf[strLen] = 0;
CFRelease(cfStr);
if (resultLen) *resultLen = strLen;
return wideBuf;
}
// Copies a UTF16 buffer into a supplied UTF8 buffer.
static void copyToNarrowFileSystemRepresentation(const wchar_t *wide, CFIndex dstBufSize, char *dstbuf) {
// Get the real length of the wide string in UTF8 characters
CFStringRef cfStr = CFStringCreateWithCharacters(kCFAllocatorSystemDefault, (const UniChar *)wide, (CFIndex)wcslen(wide));
CFIndex strLen = CFStringGetLength(cfStr);
CFIndex bytesUsed;
// Copy the wide string into the buffer and terminate
CFStringGetBytes(cfStr, CFRangeMake(0, strLen), kCFStringEncodingUTF8, 0, false, (uint8_t *)dstbuf, dstBufSize, &bytesUsed);
dstbuf[bytesUsed] = 0;
CFRelease(cfStr);
}
CF_EXPORT int _NS_stat(const char *name, struct _stat *st) {
wchar_t *wide = createWideFileSystemRepresentation(name, NULL);
int res = _wstat(wide, st);
free(wide);
return res;
}
CF_EXPORT int _NS_mkdir(const char *name) {
wchar_t *wide = createWideFileSystemRepresentation(name, NULL);
int res = _wmkdir(wide);
free(wide);
return res;
}
CF_EXPORT int _NS_rmdir(const char *name) {
wchar_t *wide = createWideFileSystemRepresentation(name, NULL);
int res = _wrmdir(wide);
free(wide);
return res;
}
CF_EXPORT int _NS_chmod(const char *name, int mode) {
wchar_t *wide = createWideFileSystemRepresentation(name, NULL);
// Convert mode
int newMode = 0;
if (mode | 0400) newMode |= _S_IREAD;
if (mode | 0200) newMode |= _S_IWRITE;
if (mode | 0100) newMode |= _S_IEXEC;
int res = _wchmod(wide, newMode);
free(wide);
return res;
}
CF_EXPORT int _NS_unlink(const char *name) {
wchar_t *wide = createWideFileSystemRepresentation(name, NULL);
int res = _wunlink(wide);
free(wide);
return res;
}
// Warning: this doesn't support dstbuf as null even though 'getcwd' does
CF_EXPORT char *_NS_getcwd(char *dstbuf, size_t size) {
if (!dstbuf) {
CFLog(kCFLogLevelWarning, CFSTR("CFPlatform: getcwd called with null buffer"));
return 0;
}
wchar_t *buf = _wgetcwd(NULL, 0);
if (!buf) {
return NULL;
}
// Convert result to UTF8
copyToNarrowFileSystemRepresentation(buf, (CFIndex)size, dstbuf);
free(buf);
return dstbuf;
}
CF_EXPORT char *_NS_getenv(const char *name) {
// todo: wide getenv
// We have to be careful what happens here, because getenv is called during cf initialization, and things like cfstring may not be working yet
return getenv(name);
}
CF_EXPORT int _NS_rename(const char *oldName, const char *newName) {
wchar_t *oldWide = createWideFileSystemRepresentation(oldName, NULL);
wchar_t *newWide = createWideFileSystemRepresentation(newName, NULL);
// _wrename on Windows does not behave exactly as rename() on Mac OS -- if the file exists, the Windows one will fail whereas the Mac OS version will replace
// To simulate the Mac OS behavior, we use the Win32 API then fill out errno if something goes wrong
BOOL winRes = MoveFileExW(oldWide, newWide, MOVEFILE_REPLACE_EXISTING);
DWORD error = GetLastError();
if (!winRes) {
switch (error) {
case ERROR_SUCCESS:
errno = 0;
break;
case ERROR_FILE_NOT_FOUND:
case ERROR_PATH_NOT_FOUND:
case ERROR_OPEN_FAILED:
errno = ENOENT;
break;
case ERROR_ACCESS_DENIED:
errno = EACCES;
break;
default:
errno = error;
}
}
free(oldWide);
free(newWide);
return (winRes ? 0 : -1);
}
CF_EXPORT int _NS_open(const char *name, int oflag, int pmode) {
wchar_t *wide = createWideFileSystemRepresentation(name, NULL);
int fd;
_wsopen_s(&fd, wide, oflag, _SH_DENYNO, _S_IREAD | _S_IWRITE);
free(wide);
return fd;
}
CF_EXPORT int _NS_chdir(const char *name) {
wchar_t *wide = createWideFileSystemRepresentation(name, NULL);
int res = _wchdir(wide);
free(wide);
return res;
}
CF_EXPORT int _NS_access(const char *name, int amode) {
// execute is always true
if (amode == 1) return 0;
wchar_t *wide = createWideFileSystemRepresentation(name, NULL);
// we only care about the read-only (04) and write-only (02) bits, so mask octal 06
int res = _waccess(wide, amode & 06);
free(wide);
return res;
}
// This is a bit different than the standard 'mkstemp', because the size parameter is needed so we know the size of the UTF8 buffer
// Also, we don't avoid the race between creating a temporary file name and opening it on Windows like we do on Mac
CF_EXPORT int _NS_mkstemp(char *name, int bufSize) {
CFIndex nameLen;
wchar_t *wide = createWideFileSystemRepresentation(name, &nameLen);
// First check to see if the directory that this new temporary file will be created in exists. If not, set errno to ENOTDIR. This mimics the behavior of mkstemp on MacOS more closely.
// Look for the last '\' in the path
wchar_t *lastSlash = wcsrchr(wide, '\\');
if (!lastSlash) {
free(wide);
return -1;
}
// Set the last slash to NULL temporarily and use it for _wstat
*lastSlash = 0;
struct _stat dirInfo;
int res = _wstat(wide, &dirInfo);
if (res < 0) {
if (errno == ENOENT) {
errno = ENOTDIR;
}
free(wide);
return -1;
}
// Restore the last slash
*lastSlash = '\\';
errno_t err = _wmktemp_s(wide, nameLen + 1);
if (err != 0) {
free(wide);
return 0;
}
int fd;
_wsopen_s(&fd, wide, _O_RDWR | _O_CREAT | CF_OPENFLGS, _SH_DENYNO, _S_IREAD | _S_IWRITE);
// Convert the wide name back into the UTF8 buffer the caller supplied
copyToNarrowFileSystemRepresentation(wide, bufSize, name);
free(wide);
return fd;
}
#endif
#if DEPLOYMENT_TARGET_WINDOWS
// Utilities to convert from a volume name to a drive letter
Boolean _isAFloppy(char driveLetter)
{
HANDLE h;
TCHAR tsz[8];
Boolean retval = false;
int iDrive;
if (driveLetter >= 'a' && driveLetter <= 'z') {
driveLetter = driveLetter - 'a' + 'A';
}
if ((driveLetter < 'A') || (driveLetter > 'Z')) {
// invalid driveLetter; I guess it's not a floppy...
return false;
}
iDrive = driveLetter - 'A' + 1;
// On Windows NT, use the technique described in the Knowledge Base article Q115828 and in the "FLOPPY" SDK sample.
wsprintf(tsz, TEXT("\\\\.\\%c:"), TEXT('@') + iDrive);
h = CreateFile(tsz, 0, FILE_SHARE_WRITE, 0, OPEN_EXISTING, 0, 0);
if (h != INVALID_HANDLE_VALUE)
{