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      1 //---------------------------------------------------------------------------------
      2 //
      3 //  Little Color Management System
      4 //  Copyright (c) 1998-2012 Marti Maria Saguer
      5 //
      6 // Permission is hereby granted, free of charge, to any person obtaining
      7 // a copy of this software and associated documentation files (the "Software"),
      8 // to deal in the Software without restriction, including without limitation
      9 // the rights to use, copy, modify, merge, publish, distribute, sublicense,
     10 // and/or sell copies of the Software, and to permit persons to whom the Software
     11 // is furnished to do so, subject to the following conditions:
     12 //
     13 // The above copyright notice and this permission notice shall be included in
     14 // all copies or substantial portions of the Software.
     15 //
     16 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
     17 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO
     18 // THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
     19 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
     20 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
     21 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
     22 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
     23 //
     24 //---------------------------------------------------------------------------------
     25 
     26 #include "lcms2_internal.h"
     27 
     28 // I am so tired about incompatibilities on those functions that here are some replacements
     29 // that hopefully would be fully portable.
     30 
     31 // compare two strings ignoring case
     32 int CMSEXPORT cmsstrcasecmp(const char* s1, const char* s2)
     33 {
     34     register const unsigned char *us1 = (const unsigned char *)s1,
     35                                  *us2 = (const unsigned char *)s2;
     36 
     37     while (toupper(*us1) == toupper(*us2++))
     38         if (*us1++ == '\0')
     39             return 0;
     40 
     41     return (toupper(*us1) - toupper(*--us2));
     42 }
     43 
     44 // long int because C99 specifies ftell in such way (7.19.9.2)
     45 long int CMSEXPORT cmsfilelength(FILE* f)
     46 {
     47     long int p , n;
     48 
     49     p = ftell(f); // register current file position
     50 
     51     if (fseek(f, 0, SEEK_END) != 0) {
     52         return -1;
     53     }
     54 
     55     n = ftell(f);
     56     fseek(f, p, SEEK_SET); // file position restored
     57 
     58     return n;
     59 }
     60 
     61 #if 0
     62 // Memory handling ------------------------------------------------------------------
     63 //
     64 // This is the interface to low-level memory management routines. By default a simple
     65 // wrapping to malloc/free/realloc is provided, although there is a limit on the max
     66 // amount of memoy that can be reclaimed. This is mostly as a safety feature to prevent
     67 // bogus or evil code to allocate huge blocks that otherwise lcms would never need.
     68 
     69 #define MAX_MEMORY_FOR_ALLOC  ((cmsUInt32Number)(1024U*1024U*512U))
     70 
     71 // User may override this behaviour by using a memory plug-in, which basically replaces
     72 // the default memory management functions. In this case, no check is performed and it
     73 // is up to the plug-in writter to keep in the safe side. There are only three functions
     74 // required to be implemented: malloc, realloc and free, although the user may want to
     75 // replace the optional mallocZero, calloc and dup as well.
     76 
     77 cmsBool   _cmsRegisterMemHandlerPlugin(cmsContext ContextID, cmsPluginBase* Plugin);
     78 
     79 // *********************************************************************************
     80 
     81 // This is the default memory allocation function. It does a very coarse
     82 // check of amout of memory, just to prevent exploits
     83 static
     84 void* _cmsMallocDefaultFn(cmsContext ContextID, cmsUInt32Number size)
     85 {
     86     if (size > MAX_MEMORY_FOR_ALLOC) return NULL;  // Never allow over maximum
     87 
     88     return (void*) malloc(size);
     89 
     90     cmsUNUSED_PARAMETER(ContextID);
     91 }
     92 
     93 // Generic allocate & zero
     94 static
     95 void* _cmsMallocZeroDefaultFn(cmsContext ContextID, cmsUInt32Number size)
     96 {
     97     void *pt = _cmsMalloc(ContextID, size);
     98     if (pt == NULL) return NULL;
     99 
    100     memset(pt, 0, size);
    101     return pt;
    102 }
    103 
    104 
    105 // The default free function. The only check proformed is against NULL pointers
    106 static
    107 void _cmsFreeDefaultFn(cmsContext ContextID, void *Ptr)
    108 {
    109     // free(NULL) is defined a no-op by C99, therefore it is safe to
    110     // avoid the check, but it is here just in case...
    111 
    112     if (Ptr) free(Ptr);
    113 
    114     cmsUNUSED_PARAMETER(ContextID);
    115 }
    116 
    117 // The default realloc function. Again it checks for exploits. If Ptr is NULL,
    118 // realloc behaves the same way as malloc and allocates a new block of size bytes.
    119 static
    120 void* _cmsReallocDefaultFn(cmsContext ContextID, void* Ptr, cmsUInt32Number size)
    121 {
    122 
    123     if (size > MAX_MEMORY_FOR_ALLOC) return NULL;  // Never realloc over 512Mb
    124 
    125     return realloc(Ptr, size);
    126 
    127     cmsUNUSED_PARAMETER(ContextID);
    128 }
    129 
    130 
    131 // The default calloc function. Allocates an array of num elements, each one of size bytes
    132 // all memory is initialized to zero.
    133 static
    134 void* _cmsCallocDefaultFn(cmsContext ContextID, cmsUInt32Number num, cmsUInt32Number size)
    135 {
    136     cmsUInt32Number Total = num * size;
    137 
    138     // Preserve calloc behaviour
    139     if (Total == 0) return NULL;
    140 
    141     // Safe check for overflow.
    142     if (num >= UINT_MAX / size) return NULL;
    143 
    144     // Check for overflow
    145     if (Total < num || Total < size) {
    146         return NULL;
    147     }
    148 
    149     if (Total > MAX_MEMORY_FOR_ALLOC) return NULL;  // Never alloc over 512Mb
    150 
    151     return _cmsMallocZero(ContextID, Total);
    152 }
    153 
    154 // Generic block duplication
    155 static
    156 void* _cmsDupDefaultFn(cmsContext ContextID, const void* Org, cmsUInt32Number size)
    157 {
    158     void* mem;
    159 
    160     if (size > MAX_MEMORY_FOR_ALLOC) return NULL;  // Never dup over 512Mb
    161 
    162     mem = _cmsMalloc(ContextID, size);
    163 
    164     if (mem != NULL && Org != NULL)
    165         memmove(mem, Org, size);
    166 
    167     return mem;
    168 }
    169 
    170 
    171 // Pointers to memory manager functions in Context0
    172 _cmsMemPluginChunkType _cmsMemPluginChunk = { _cmsMallocDefaultFn, _cmsMallocZeroDefaultFn, _cmsFreeDefaultFn,
    173                                               _cmsReallocDefaultFn, _cmsCallocDefaultFn,    _cmsDupDefaultFn
    174                                             };
    175 
    176 
    177 // Reset and duplicate memory manager
    178 void _cmsAllocMemPluginChunk(struct _cmsContext_struct* ctx, const struct _cmsContext_struct* src)
    179 {
    180     _cmsAssert(ctx != NULL);
    181 
    182     if (src != NULL) {
    183 
    184         // Duplicate
    185         ctx ->chunks[MemPlugin] = _cmsSubAllocDup(ctx ->MemPool, src ->chunks[MemPlugin], sizeof(_cmsMemPluginChunkType));
    186     }
    187     else {
    188 
    189         // To reset it, we use the default allocators, which cannot be overriden
    190         ctx ->chunks[MemPlugin] = &ctx ->DefaultMemoryManager;
    191     }
    192 }
    193 
    194 // Auxiliar to fill memory management functions from plugin (or context 0 defaults)
    195 void _cmsInstallAllocFunctions(cmsPluginMemHandler* Plugin, _cmsMemPluginChunkType* ptr)
    196 {
    197     if (Plugin == NULL) {
    198 
    199         memcpy(ptr, &_cmsMemPluginChunk, sizeof(_cmsMemPluginChunk));
    200     }
    201     else {
    202 
    203         ptr ->MallocPtr  = Plugin -> MallocPtr;
    204         ptr ->FreePtr    = Plugin -> FreePtr;
    205         ptr ->ReallocPtr = Plugin -> ReallocPtr;
    206 
    207         // Make sure we revert to defaults
    208         ptr ->MallocZeroPtr= _cmsMallocZeroDefaultFn;
    209         ptr ->CallocPtr    = _cmsCallocDefaultFn;
    210         ptr ->DupPtr       = _cmsDupDefaultFn;
    211 
    212         if (Plugin ->MallocZeroPtr != NULL) ptr ->MallocZeroPtr = Plugin -> MallocZeroPtr;
    213         if (Plugin ->CallocPtr != NULL)     ptr ->CallocPtr     = Plugin -> CallocPtr;
    214         if (Plugin ->DupPtr != NULL)        ptr ->DupPtr        = Plugin -> DupPtr;
    215 
    216     }
    217 }
    218 
    219 
    220 // Plug-in replacement entry
    221 cmsBool  _cmsRegisterMemHandlerPlugin(cmsContext ContextID, cmsPluginBase *Data)
    222 {
    223     cmsPluginMemHandler* Plugin = (cmsPluginMemHandler*) Data;
    224     _cmsMemPluginChunkType* ptr;
    225 
    226     // NULL forces to reset to defaults. In this special case, the defaults are stored in the context structure.
    227     // Remaining plug-ins does NOT have any copy in the context structure, but this is somehow special as the
    228     // context internal data should be malloce'd by using those functions.
    229     if (Data == NULL) {
    230 
    231        struct _cmsContext_struct* ctx = ( struct _cmsContext_struct*) ContextID;
    232 
    233        // Return to the default allocators
    234         if (ContextID != NULL) {
    235             ctx->chunks[MemPlugin] = (void*) &ctx->DefaultMemoryManager;
    236         }
    237         return TRUE;
    238     }
    239 
    240     // Check for required callbacks
    241     if (Plugin -> MallocPtr == NULL ||
    242         Plugin -> FreePtr == NULL ||
    243         Plugin -> ReallocPtr == NULL) return FALSE;
    244 
    245     // Set replacement functions
    246     ptr = (_cmsMemPluginChunkType*) _cmsContextGetClientChunk(ContextID, MemPlugin);
    247     if (ptr == NULL)
    248         return FALSE;
    249 
    250     _cmsInstallAllocFunctions(Plugin, ptr);
    251     return TRUE;
    252 }
    253 #else
    254 #include "../../../../../include/fxcrt/fx_system.h"
    255 #include "../../../../../include/fxcrt/fx_memory.h"
    256 
    257 cmsBool  _cmsRegisterMemHandlerPlugin(cmsContext ContextID, cmsPluginBase* Plugin)
    258 {
    259 	return TRUE;
    260 }
    261 
    262 // Generic allocate
    263 void* CMSEXPORT _cmsMalloc(cmsContext ContextID, cmsUInt32Number size)
    264 {
    265     return FXMEM_DefaultAlloc(size, FXMEM_NONLEAVE);
    266 }
    267 
    268 // Generic allocate & zero
    269 void* CMSEXPORT _cmsMallocZero(cmsContext ContextID, cmsUInt32Number size)
    270 {
    271 	void* p = FXMEM_DefaultAlloc(size, FXMEM_NONLEAVE);
    272 	if (p) FXSYS_memset32(p, 0, size);
    273 	return p;
    274 }
    275 
    276 // Generic calloc
    277 void* CMSEXPORT _cmsCalloc(cmsContext ContextID, cmsUInt32Number num, cmsUInt32Number size)
    278 {
    279 	cmsUInt32Number total = num * size;
    280 	if (total == 0 || total / size != num || total >= 512 * 1024 * 1024)
    281 		return NULL;
    282 
    283 	return _cmsMallocZero(ContextID, num * size);
    284 }
    285 
    286 // Generic reallocate
    287 void* CMSEXPORT _cmsRealloc(cmsContext ContextID, void* Ptr, cmsUInt32Number size)
    288 {
    289 	return FXMEM_DefaultRealloc(Ptr, size, FXMEM_NONLEAVE);
    290 }
    291 
    292 // Generic free memory
    293 void CMSEXPORT _cmsFree(cmsContext ContextID, void* Ptr)
    294 {
    295 	if (Ptr != NULL) FXMEM_DefaultFree(Ptr, 0);
    296 }
    297 
    298 // Generic block duplication
    299 void* CMSEXPORT _cmsDupMem(cmsContext ContextID, const void* Org, cmsUInt32Number size)
    300 {
    301 	void* p = FXMEM_DefaultAlloc(size, FXMEM_NONLEAVE);
    302 	FXSYS_memmove32(p, Org, size);
    303 	return p;
    304 }
    305 
    306 _cmsMemPluginChunkType _cmsMemPluginChunk = {_cmsMalloc, _cmsMallocZero, _cmsFree,
    307 	                                         _cmsRealloc, _cmsCalloc,    _cmsDupMem
    308                                             };
    309 
    310 void _cmsAllocMemPluginChunk(struct _cmsContext_struct* ctx, const struct _cmsContext_struct* src)
    311 {
    312 	_cmsAssert(ctx != NULL);
    313 
    314 	if (src != NULL) {
    315 
    316 		// Duplicate
    317 		ctx ->chunks[MemPlugin] = _cmsSubAllocDup(ctx ->MemPool, src ->chunks[MemPlugin], sizeof(_cmsMemPluginChunkType));
    318 	}
    319 	else {
    320 
    321 		// To reset it, we use the default allocators, which cannot be overriden
    322 		ctx ->chunks[MemPlugin] = &ctx ->DefaultMemoryManager;
    323 	}
    324 }
    325 
    326 void _cmsInstallAllocFunctions(cmsPluginMemHandler* Plugin, _cmsMemPluginChunkType* ptr)
    327 {
    328 	if (Plugin == NULL) {
    329 
    330 		memcpy(ptr, &_cmsMemPluginChunk, sizeof(_cmsMemPluginChunk));
    331 	}
    332 	else {
    333 
    334 		ptr ->MallocPtr  = Plugin -> MallocPtr;
    335 		ptr ->FreePtr    = Plugin -> FreePtr;
    336 		ptr ->ReallocPtr = Plugin -> ReallocPtr;
    337 
    338 		// Make sure we revert to defaults
    339 		ptr ->MallocZeroPtr= _cmsMallocZero;
    340 		ptr ->CallocPtr    = _cmsCalloc;
    341 		ptr ->DupPtr       = _cmsDupMem;
    342 
    343 		if (Plugin ->MallocZeroPtr != NULL) ptr ->MallocZeroPtr = Plugin -> MallocZeroPtr;
    344 		if (Plugin ->CallocPtr != NULL)     ptr ->CallocPtr     = Plugin -> CallocPtr;
    345 		if (Plugin ->DupPtr != NULL)        ptr ->DupPtr        = Plugin -> DupPtr;
    346 
    347 	}
    348 }
    349 #endif
    350 
    351 // ********************************************************************************************
    352 
    353 // Sub allocation takes care of many pointers of small size. The memory allocated in
    354 // this way have be freed at once. Next function allocates a single chunk for linked list
    355 // I prefer this method over realloc due to the big inpact on xput realloc may have if
    356 // memory is being swapped to disk. This approach is safer (although that may not be true on all platforms)
    357 static
    358 _cmsSubAllocator_chunk* _cmsCreateSubAllocChunk(cmsContext ContextID, cmsUInt32Number Initial)
    359 {
    360     _cmsSubAllocator_chunk* chunk;
    361 
    362     // 20K by default
    363     if (Initial == 0)
    364         Initial = 20*1024;
    365 
    366     // Create the container
    367     chunk = (_cmsSubAllocator_chunk*) _cmsMallocZero(ContextID, sizeof(_cmsSubAllocator_chunk));
    368     if (chunk == NULL) return NULL;
    369 
    370     // Initialize values
    371     chunk ->Block     = (cmsUInt8Number*) _cmsMalloc(ContextID, Initial);
    372     if (chunk ->Block == NULL) {
    373 
    374         // Something went wrong
    375         _cmsFree(ContextID, chunk);
    376         return NULL;
    377     }
    378 
    379     chunk ->BlockSize = Initial;
    380     chunk ->Used      = 0;
    381     chunk ->next      = NULL;
    382 
    383     return chunk;
    384 }
    385 
    386 // The suballocated is nothing but a pointer to the first element in the list. We also keep
    387 // the thread ID in this structure.
    388 _cmsSubAllocator* _cmsCreateSubAlloc(cmsContext ContextID, cmsUInt32Number Initial)
    389 {
    390     _cmsSubAllocator* sub;
    391 
    392     // Create the container
    393     sub = (_cmsSubAllocator*) _cmsMallocZero(ContextID, sizeof(_cmsSubAllocator));
    394     if (sub == NULL) return NULL;
    395 
    396     sub ->ContextID = ContextID;
    397 
    398     sub ->h = _cmsCreateSubAllocChunk(ContextID, Initial);
    399     if (sub ->h == NULL) {
    400         _cmsFree(ContextID, sub);
    401         return NULL;
    402     }
    403 
    404     return sub;
    405 }
    406 
    407 
    408 // Get rid of whole linked list
    409 void _cmsSubAllocDestroy(_cmsSubAllocator* sub)
    410 {
    411     _cmsSubAllocator_chunk *chunk, *n;
    412 
    413     for (chunk = sub ->h; chunk != NULL; chunk = n) {
    414 
    415         n = chunk->next;
    416         if (chunk->Block != NULL) _cmsFree(sub ->ContextID, chunk->Block);
    417         _cmsFree(sub ->ContextID, chunk);
    418     }
    419 
    420     // Free the header
    421     _cmsFree(sub ->ContextID, sub);
    422 }
    423 
    424 
    425 // Get a pointer to small memory block.
    426 void*  _cmsSubAlloc(_cmsSubAllocator* sub, cmsUInt32Number size)
    427 {
    428     cmsUInt32Number Free = sub -> h ->BlockSize - sub -> h -> Used;
    429     cmsUInt8Number* ptr;
    430 
    431     size = _cmsALIGNMEM(size);
    432 
    433     // Check for memory. If there is no room, allocate a new chunk of double memory size.
    434     if (size > Free) {
    435 
    436         _cmsSubAllocator_chunk* chunk;
    437         cmsUInt32Number newSize;
    438 
    439         newSize = sub -> h ->BlockSize * 2;
    440         if (newSize < size) newSize = size;
    441 
    442         chunk = _cmsCreateSubAllocChunk(sub -> ContextID, newSize);
    443         if (chunk == NULL) return NULL;
    444 
    445         // Link list
    446         chunk ->next = sub ->h;
    447         sub ->h    = chunk;
    448 
    449     }
    450 
    451     ptr =  sub -> h ->Block + sub -> h ->Used;
    452     sub -> h -> Used += size;
    453 
    454     return (void*) ptr;
    455 }
    456 
    457 // Duplicate in pool
    458 void* _cmsSubAllocDup(_cmsSubAllocator* s, const void *ptr, cmsUInt32Number size)
    459 {
    460     void *NewPtr;
    461 
    462     // Dup of null pointer is also NULL
    463     if (ptr == NULL)
    464         return NULL;
    465 
    466     NewPtr = _cmsSubAlloc(s, size);
    467 
    468     if (ptr != NULL && NewPtr != NULL) {
    469         memcpy(NewPtr, ptr, size);
    470     }
    471 
    472     return NewPtr;
    473 }
    474 
    475 
    476 
    477 // Error logging ******************************************************************
    478 
    479 // There is no error handling at all. When a funtion fails, it returns proper value.
    480 // For example, all create functions does return NULL on failure. Other return FALSE
    481 // It may be interesting, for the developer, to know why the function is failing.
    482 // for that reason, lcms2 does offer a logging function. This function does recive
    483 // a ENGLISH string with some clues on what is going wrong. You can show this
    484 // info to the end user, or just create some sort of log.
    485 // The logging function should NOT terminate the program, as this obviously can leave
    486 // resources. It is the programmer's responsability to check each function return code
    487 // to make sure it didn't fail.
    488 
    489 // Error messages are limited to MAX_ERROR_MESSAGE_LEN
    490 
    491 #define MAX_ERROR_MESSAGE_LEN   1024
    492 
    493 // ---------------------------------------------------------------------------------------------------------
    494 
    495 // This is our default log error
    496 static void DefaultLogErrorHandlerFunction(cmsContext ContextID, cmsUInt32Number ErrorCode, const char *Text);
    497 
    498 // Context0 storage, which is global
    499 _cmsLogErrorChunkType _cmsLogErrorChunk = { DefaultLogErrorHandlerFunction };
    500 
    501 // Allocates and inits error logger container for a given context. If src is NULL, only initializes the value
    502 // to the default. Otherwise, it duplicates the value. The interface is standard across all context clients
    503 void _cmsAllocLogErrorChunk(struct _cmsContext_struct* ctx,
    504                             const struct _cmsContext_struct* src)
    505 {
    506     static _cmsLogErrorChunkType LogErrorChunk = { DefaultLogErrorHandlerFunction };
    507     void* from;
    508 
    509      if (src != NULL) {
    510         from = src ->chunks[Logger];
    511     }
    512     else {
    513        from = &LogErrorChunk;
    514     }
    515 
    516     ctx ->chunks[Logger] = _cmsSubAllocDup(ctx ->MemPool, from, sizeof(_cmsLogErrorChunkType));
    517 }
    518 
    519 // The default error logger does nothing.
    520 static
    521 void DefaultLogErrorHandlerFunction(cmsContext ContextID, cmsUInt32Number ErrorCode, const char *Text)
    522 {
    523     // fprintf(stderr, "[lcms]: %s\n", Text);
    524     // fflush(stderr);
    525 
    526      cmsUNUSED_PARAMETER(ContextID);
    527      cmsUNUSED_PARAMETER(ErrorCode);
    528      cmsUNUSED_PARAMETER(Text);
    529 }
    530 
    531 // Change log error, context based
    532 void CMSEXPORT cmsSetLogErrorHandlerTHR(cmsContext ContextID, cmsLogErrorHandlerFunction Fn)
    533 {
    534     _cmsLogErrorChunkType* lhg = (_cmsLogErrorChunkType*) _cmsContextGetClientChunk(ContextID, Logger);
    535 
    536     if (lhg != NULL) {
    537 
    538         if (Fn == NULL)
    539             lhg -> LogErrorHandler = DefaultLogErrorHandlerFunction;
    540         else
    541             lhg -> LogErrorHandler = Fn;
    542     }
    543 }
    544 
    545 // Change log error, legacy
    546 void CMSEXPORT cmsSetLogErrorHandler(cmsLogErrorHandlerFunction Fn)
    547 {
    548     cmsSetLogErrorHandlerTHR(NULL, Fn);
    549 }
    550 
    551 // Log an error
    552 // ErrorText is a text holding an english description of error.
    553 void CMSEXPORT cmsSignalError(cmsContext ContextID, cmsUInt32Number ErrorCode, const char *ErrorText, ...)
    554 {
    555     va_list args;
    556     char Buffer[MAX_ERROR_MESSAGE_LEN];
    557     _cmsLogErrorChunkType* lhg;
    558 
    559 
    560     va_start(args, ErrorText);
    561     vsnprintf(Buffer, MAX_ERROR_MESSAGE_LEN-1, ErrorText, args);
    562     va_end(args);
    563 
    564     // Check for the context, if specified go there. If not, go for the global
    565     lhg = (_cmsLogErrorChunkType*) _cmsContextGetClientChunk(ContextID, Logger);
    566     if (lhg ->LogErrorHandler) {
    567         lhg ->LogErrorHandler(ContextID, ErrorCode, Buffer);
    568     }
    569 }
    570 
    571 // Utility function to print signatures
    572 void _cmsTagSignature2String(char String[5], cmsTagSignature sig)
    573 {
    574     cmsUInt32Number be;
    575 
    576     // Convert to big endian
    577     be = _cmsAdjustEndianess32((cmsUInt32Number) sig);
    578 
    579     // Move chars
    580     memmove(String, &be, 4);
    581 
    582     // Make sure of terminator
    583     String[4] = 0;
    584 }
    585 
    586 //--------------------------------------------------------------------------------------------------
    587 
    588 
    589 static
    590 void* defMtxCreate(cmsContext id)
    591 {
    592     _cmsMutex* ptr_mutex = (_cmsMutex*) _cmsMalloc(id, sizeof(_cmsMutex));
    593     _cmsInitMutexPrimitive(ptr_mutex);
    594     return (void*) ptr_mutex;
    595 }
    596 
    597 static
    598 void defMtxDestroy(cmsContext id, void* mtx)
    599 {
    600     _cmsDestroyMutexPrimitive((_cmsMutex *) mtx);
    601     _cmsFree(id, mtx);
    602 }
    603 
    604 static
    605 cmsBool defMtxLock(cmsContext id, void* mtx)
    606 {
    607     cmsUNUSED_PARAMETER(id);
    608     return _cmsLockPrimitive((_cmsMutex *) mtx) == 0;
    609 }
    610 
    611 static
    612 void defMtxUnlock(cmsContext id, void* mtx)
    613 {
    614     cmsUNUSED_PARAMETER(id);
    615     _cmsUnlockPrimitive((_cmsMutex *) mtx);
    616 }
    617 
    618 
    619 
    620 // Pointers to memory manager functions in Context0
    621 _cmsMutexPluginChunkType _cmsMutexPluginChunk = { defMtxCreate, defMtxDestroy, defMtxLock, defMtxUnlock };
    622 
    623 // Allocate and init mutex container.
    624 void _cmsAllocMutexPluginChunk(struct _cmsContext_struct* ctx,
    625                                         const struct _cmsContext_struct* src)
    626 {
    627     static _cmsMutexPluginChunkType MutexChunk = {defMtxCreate, defMtxDestroy, defMtxLock, defMtxUnlock };
    628     void* from;
    629 
    630      if (src != NULL) {
    631         from = src ->chunks[MutexPlugin];
    632     }
    633     else {
    634        from = &MutexChunk;
    635     }
    636 
    637     ctx ->chunks[MutexPlugin] = _cmsSubAllocDup(ctx ->MemPool, from, sizeof(_cmsMutexPluginChunkType));
    638 }
    639 
    640 // Register new ways to transform
    641 cmsBool  _cmsRegisterMutexPlugin(cmsContext ContextID, cmsPluginBase* Data)
    642 {
    643     cmsPluginMutex* Plugin = (cmsPluginMutex*) Data;
    644     _cmsMutexPluginChunkType* ctx = ( _cmsMutexPluginChunkType*) _cmsContextGetClientChunk(ContextID, MutexPlugin);
    645 
    646     if (Data == NULL) {
    647 
    648         // No lock routines
    649         ctx->CreateMutexPtr = NULL;
    650         ctx->DestroyMutexPtr = NULL;
    651         ctx->LockMutexPtr = NULL;
    652         ctx ->UnlockMutexPtr = NULL;
    653         return TRUE;
    654     }
    655 
    656     // Factory callback is required
    657     if (Plugin ->CreateMutexPtr == NULL || Plugin ->DestroyMutexPtr == NULL ||
    658         Plugin ->LockMutexPtr == NULL || Plugin ->UnlockMutexPtr == NULL) return FALSE;
    659 
    660 
    661     ctx->CreateMutexPtr  = Plugin->CreateMutexPtr;
    662     ctx->DestroyMutexPtr = Plugin ->DestroyMutexPtr;
    663     ctx ->LockMutexPtr   = Plugin ->LockMutexPtr;
    664     ctx ->UnlockMutexPtr = Plugin ->UnlockMutexPtr;
    665 
    666     // All is ok
    667     return TRUE;
    668 }
    669 
    670 // Generic Mutex fns
    671 void* CMSEXPORT _cmsCreateMutex(cmsContext ContextID)
    672 {
    673     _cmsMutexPluginChunkType* ptr = (_cmsMutexPluginChunkType*) _cmsContextGetClientChunk(ContextID, MutexPlugin);
    674 
    675     if (ptr ->CreateMutexPtr == NULL) return NULL;
    676 
    677     return ptr ->CreateMutexPtr(ContextID);
    678 }
    679 
    680 void CMSEXPORT _cmsDestroyMutex(cmsContext ContextID, void* mtx)
    681 {
    682     _cmsMutexPluginChunkType* ptr = (_cmsMutexPluginChunkType*) _cmsContextGetClientChunk(ContextID, MutexPlugin);
    683 
    684     if (ptr ->DestroyMutexPtr != NULL) {
    685 
    686         ptr ->DestroyMutexPtr(ContextID, mtx);
    687     }
    688 }
    689 
    690 cmsBool CMSEXPORT _cmsLockMutex(cmsContext ContextID, void* mtx)
    691 {
    692     _cmsMutexPluginChunkType* ptr = (_cmsMutexPluginChunkType*) _cmsContextGetClientChunk(ContextID, MutexPlugin);
    693 
    694     if (ptr ->LockMutexPtr == NULL) return TRUE;
    695 
    696     return ptr ->LockMutexPtr(ContextID, mtx);
    697 }
    698 
    699 void CMSEXPORT _cmsUnlockMutex(cmsContext ContextID, void* mtx)
    700 {
    701     _cmsMutexPluginChunkType* ptr = (_cmsMutexPluginChunkType*) _cmsContextGetClientChunk(ContextID, MutexPlugin);
    702 
    703     if (ptr ->UnlockMutexPtr != NULL) {
    704 
    705         ptr ->UnlockMutexPtr(ContextID, mtx);
    706     }
    707 }
    708