Quelle cmserr.c Sprache: C

/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.  Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/

// This file is available under and governed by the GNU General Public
// License version 2 only, as published by the Free Software Foundation.
// However, the following notice accompanied the original version of this
// file:
//
//---------------------------------------------------------------------------------
//
//  Little Color Management System
//  Copyright (c) 1998-2022 Marti Maria Saguer
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the "Software"),
// to deal in the Software without restriction, including without limitation
// the rights to use, copy, modify, merge, publish, distribute, sublicense,
// and/or sell copies of the Software, and to permit persons to whom the Software
// is furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO
// THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
//---------------------------------------------------------------------------------

#include "lcms2_internal.h"

// This function is here to help applications to prevent mixing lcms versions on header and shared objects.
int CMSEXPORT cmsGetEncodedCMMversion(void)
{
       return LCMS_VERSION;
}

// I am so tired about incompatibilities on those functions that here are some replacements
// that hopefully would be fully portable.

// compare two strings ignoring case
int CMSEXPORT cmsstrcasecmp(const char* s1, const char* s2)
{
    CMSREGISTER const unsigned char *us1 = (const unsigned char *)s1,
                                 *us2 = (const unsigned char *)s2;

    while (toupper(*us1) == toupper(*us2++))
        if (*us1++ == '\0')
            return 0;

    return (toupper(*us1) - toupper(*--us2));
}

// long int because C99 specifies ftell in such way (7.19.9.2)
long int CMSEXPORT cmsfilelength(FILE* f)
{
    long int p , n;

    p = ftell(f); // register current file position
    if (p == -1L)
        return -1L;

    if (fseek(f, 0, SEEK_END) != 0) {
        return -1L;
    }

    n = ftell(f);
    fseek(f, p, SEEK_SET); // file position restored

    return n;
}

// Memory handling ------------------------------------------------------------------
//
// This is the interface to low-level memory management routines. By default a simple
// wrapping to malloc/free/realloc is provided, although there is a limit on the max
// amount of memoy that can be reclaimed. This is mostly as a safety feature to prevent
// bogus or evil code to allocate huge blocks that otherwise lcms would never need.

#define MAX_MEMORY_FOR_ALLOC  ((cmsUInt32Number)(1024U*1024U*512U))

// User may override this behaviour by using a memory plug-in, which basically replaces
// the default memory management functions. In this case, no check is performed and it
// is up to the plug-in writer to keep in the safe side. There are only three functions
// required to be implemented: malloc, realloc and free, although the user may want to
// replace the optional mallocZero, calloc and dup as well.

cmsBool   _cmsRegisterMemHandlerPlugin(cmsContext ContextID, cmsPluginBase* Plugin);

// *********************************************************************************

// This is the default memory allocation function. It does a very coarse
// check of amount of memory, just to prevent exploits
static
void* _cmsMallocDefaultFn(cmsContext ContextID, cmsUInt32Number size)
{
    if (size > MAX_MEMORY_FOR_ALLOC) return NULL;  // Never allow over maximum

    return (void*) malloc(size);

    cmsUNUSED_PARAMETER(ContextID);
}

// Generic allocate & zero
static
void* _cmsMallocZeroDefaultFn(cmsContext ContextID, cmsUInt32Number size)
{
    void *pt = _cmsMalloc(ContextID, size);
    if (pt == NULL) return NULL;

    memset(pt, 0, size);
    return pt;
}

// The default free function. The only check proformed is against NULL pointers
static
void _cmsFreeDefaultFn(cmsContext ContextID, void *Ptr)
{
    // free(NULL) is defined a no-op by C99, therefore it is safe to
    // avoid the check, but it is here just in case...

    if (Ptr) free(Ptr);

    cmsUNUSED_PARAMETER(ContextID);
}

// The default realloc function. Again it checks for exploits. If Ptr is NULL,
// realloc behaves the same way as malloc and allocates a new block of size bytes.
static
void* _cmsReallocDefaultFn(cmsContext ContextID, void* Ptr, cmsUInt32Number size)
{

    if (size > MAX_MEMORY_FOR_ALLOC) return NULL;  // Never realloc over 512Mb

    return realloc(Ptr, size);

    cmsUNUSED_PARAMETER(ContextID);
}

// The default calloc function. Allocates an array of num elements, each one of size bytes
// all memory is initialized to zero.
static
void* _cmsCallocDefaultFn(cmsContext ContextID, cmsUInt32Number num, cmsUInt32Number size)
{
    cmsUInt32Number Total = num * size;

    // Preserve calloc behaviour
    if (Total == 0) return NULL;

    // Safe check for overflow.
    if (num >= UINT_MAX / size) return NULL;

    // Check for overflow
    if (Total < num || Total < size) {
        return NULL;
    }

    if (Total > MAX_MEMORY_FOR_ALLOC) return NULL;  // Never alloc over 512Mb

    return _cmsMallocZero(ContextID, Total);
}

// Generic block duplication
static
void* _cmsDupDefaultFn(cmsContext ContextID, const void* Org, cmsUInt32Number size)
{
    void* mem;

    if (size > MAX_MEMORY_FOR_ALLOC) return NULL;  // Never dup over 512Mb

    mem = _cmsMalloc(ContextID, size);

    if (mem != NULL && Org != NULL)
        memmove(mem, Org, size);

    return mem;
}

// Pointers to memory manager functions in Context0
_cmsMemPluginChunkType _cmsMemPluginChunk = { _cmsMallocDefaultFn, _cmsMallocZeroDefaultFn, _cmsFreeDefaultFn,
                                              _cmsReallocDefaultFn, _cmsCallocDefaultFn,    _cmsDupDefaultFn
                                            };

// Reset and duplicate memory manager
void _cmsAllocMemPluginChunk(struct _cmsContext_struct* ctx, const struct _cmsContext_struct* src)
{
    _cmsAssert(ctx != NULL);

    if (src != NULL) {

        // Duplicate
        ctx ->chunks[MemPlugin] = _cmsSubAllocDup(ctx ->MemPool, src ->chunks[MemPlugin], sizeof(_cmsMemPluginChunkType));
    }
    else {

        // To reset it, we use the default allocators, which cannot be overridden
        ctx ->chunks[MemPlugin] = &ctx ->DefaultMemoryManager;
    }
}

// Auxiliary to fill memory management functions from plugin (or context 0 defaults)
void _cmsInstallAllocFunctions(cmsPluginMemHandler* Plugin, _cmsMemPluginChunkType* ptr)
{
    if (Plugin == NULL) {

        memcpy(ptr, &_cmsMemPluginChunk, sizeof(_cmsMemPluginChunk));
    }
    else {

        ptr ->MallocPtr  = Plugin -> MallocPtr;
        ptr ->FreePtr    = Plugin -> FreePtr;
        ptr ->ReallocPtr = Plugin -> ReallocPtr;

        // Make sure we revert to defaults
        ptr ->MallocZeroPtr= _cmsMallocZeroDefaultFn;
        ptr ->CallocPtr    = _cmsCallocDefaultFn;
        ptr ->DupPtr       = _cmsDupDefaultFn;

        if (Plugin ->MallocZeroPtr != NULL) ptr ->MallocZeroPtr = Plugin -> MallocZeroPtr;
        if (Plugin ->CallocPtr != NULL)     ptr ->CallocPtr     = Plugin -> CallocPtr;
        if (Plugin ->DupPtr != NULL)        ptr ->DupPtr        = Plugin -> DupPtr;

    }
}

// Plug-in replacement entry
cmsBool  _cmsRegisterMemHandlerPlugin(cmsContext ContextID, cmsPluginBase *Data)
{
    cmsPluginMemHandler* Plugin = (cmsPluginMemHandler*) Data;
    _cmsMemPluginChunkType* ptr;

    // NULL forces to reset to defaults. In this special case, the defaults are stored in the context structure.
    // Remaining plug-ins does NOT have any copy in the context structure, but this is somehow special as the
    // context internal data should be malloce'd by using those functions.
    if (Data == NULL) {

       struct _cmsContext_struct* ctx = ( struct _cmsContext_struct*) ContextID;

       // Return to the default allocators
        if (ContextID != NULL) {
            ctx->chunks[MemPlugin] = (void*) &ctx->DefaultMemoryManager;
        }
        return TRUE;
    }

    // Check for required callbacks
    if (Plugin -> MallocPtr == NULL ||
        Plugin -> FreePtr == NULL ||
        Plugin -> ReallocPtr == NULL) return FALSE;

    // Set replacement functions
    ptr = (_cmsMemPluginChunkType*) _cmsContextGetClientChunk(ContextID, MemPlugin);
    if (ptr == NULL)
        return FALSE;

    _cmsInstallAllocFunctions(Plugin, ptr);
    return TRUE;
}

// Generic allocate
void* CMSEXPORT _cmsMalloc(cmsContext ContextID, cmsUInt32Number size)
{
    _cmsMemPluginChunkType* ptr = (_cmsMemPluginChunkType*) _cmsContextGetClientChunk(ContextID, MemPlugin);
    return ptr ->MallocPtr(ContextID, size);
}

// Generic allocate & zero
void* CMSEXPORT _cmsMallocZero(cmsContext ContextID, cmsUInt32Number size)
{
    _cmsMemPluginChunkType* ptr = (_cmsMemPluginChunkType*) _cmsContextGetClientChunk(ContextID, MemPlugin);
    return ptr->MallocZeroPtr(ContextID, size);
}

// Generic calloc
void* CMSEXPORT _cmsCalloc(cmsContext ContextID, cmsUInt32Number num, cmsUInt32Number size)
{
    _cmsMemPluginChunkType* ptr = (_cmsMemPluginChunkType*) _cmsContextGetClientChunk(ContextID, MemPlugin);
    return ptr->CallocPtr(ContextID, num, size);
}

// Generic reallocate
void* CMSEXPORT _cmsRealloc(cmsContext ContextID, void* Ptr, cmsUInt32Number size)
{
    _cmsMemPluginChunkType* ptr = (_cmsMemPluginChunkType*) _cmsContextGetClientChunk(ContextID, MemPlugin);
    return ptr->ReallocPtr(ContextID, Ptr, size);
}

// Generic free memory
void CMSEXPORT _cmsFree(cmsContext ContextID, void* Ptr)
{
    if (Ptr != NULL) {
        _cmsMemPluginChunkType* ptr = (_cmsMemPluginChunkType*) _cmsContextGetClientChunk(ContextID, MemPlugin);
        ptr ->FreePtr(ContextID, Ptr);
    }
}

// Generic block duplication
void* CMSEXPORT _cmsDupMem(cmsContext ContextID, const void* Org, cmsUInt32Number size)
{
    _cmsMemPluginChunkType* ptr = (_cmsMemPluginChunkType*) _cmsContextGetClientChunk(ContextID, MemPlugin);
    return ptr ->DupPtr(ContextID, Org, size);
}

// ********************************************************************************************

// Sub allocation takes care of many pointers of small size. The memory allocated in
// this way have be freed at once. Next function allocates a single chunk for linked list
// I prefer this method over realloc due to the big impact on xput realloc may have if
// memory is being swapped to disk. This approach is safer (although that may not be true on all platforms)
static
_cmsSubAllocator_chunk* _cmsCreateSubAllocChunk(cmsContext ContextID, cmsUInt32Number Initial)
{
    _cmsSubAllocator_chunk* chunk;

    // 20K by default
    if (Initial == 0)
        Initial = 20*1024;

    // Create the container
    chunk = (_cmsSubAllocator_chunk*) _cmsMallocZero(ContextID, sizeof(_cmsSubAllocator_chunk));
    if (chunk == NULL) return NULL;

    // Initialize values
    chunk ->Block     = (cmsUInt8Number*) _cmsMalloc(ContextID, Initial);
    if (chunk ->Block == NULL) {

        // Something went wrong
        _cmsFree(ContextID, chunk);
        return NULL;
    }

    chunk ->BlockSize = Initial;
    chunk ->Used      = 0;
    chunk ->next      = NULL;

    return chunk;
}

// The suballocated is nothing but a pointer to the first element in the list. We also keep
// the thread ID in this structure.
_cmsSubAllocator* _cmsCreateSubAlloc(cmsContext ContextID, cmsUInt32Number Initial)
{
    _cmsSubAllocator* sub;

    // Create the container
    sub = (_cmsSubAllocator*) _cmsMallocZero(ContextID, sizeof(_cmsSubAllocator));
    if (sub == NULL) return NULL;

    sub ->ContextID = ContextID;

    sub ->h = _cmsCreateSubAllocChunk(ContextID, Initial);
    if (sub ->h == NULL) {
        _cmsFree(ContextID, sub);
        return NULL;
    }

    return sub;
}

// Get rid of whole linked list
void _cmsSubAllocDestroy(_cmsSubAllocator* sub)
{
    _cmsSubAllocator_chunk *chunk, *n;

    for (chunk = sub ->h; chunk != NULL; chunk = n) {

        n = chunk->next;
        if (chunk->Block != NULL) _cmsFree(sub ->ContextID, chunk->Block);
        _cmsFree(sub ->ContextID, chunk);
    }

    // Free the header
    _cmsFree(sub ->ContextID, sub);
}

// Get a pointer to small memory block.
void*  _cmsSubAlloc(_cmsSubAllocator* sub, cmsUInt32Number size)
{
    cmsUInt32Number Free = sub -> h ->BlockSize - sub -> h -> Used;
    cmsUInt8Number* ptr;

    size = _cmsALIGNMEM(size);

    // Check for memory. If there is no room, allocate a new chunk of double memory size.
    if (size > Free) {

        _cmsSubAllocator_chunk* chunk;
        cmsUInt32Number newSize;

        newSize = sub -> h ->BlockSize * 2;
        if (newSize < size) newSize = size;

        chunk = _cmsCreateSubAllocChunk(sub -> ContextID, newSize);
        if (chunk == NULL) return NULL;

        // Link list
        chunk ->next = sub ->h;
        sub ->h    = chunk;

    }

    ptr =  sub -> h ->Block + sub -> h ->Used;
    sub -> h -> Used += size;

    return (void*) ptr;
}

// Duplicate in pool
void* _cmsSubAllocDup(_cmsSubAllocator* s, const void *ptr, cmsUInt32Number size)
{
    void *NewPtr;

    // Dup of null pointer is also NULL
    if (ptr == NULL)
        return NULL;

    NewPtr = _cmsSubAlloc(s, size);

    if (ptr != NULL && NewPtr != NULL) {
        memcpy(NewPtr, ptr, size);
    }

    return NewPtr;
}

// Error logging ******************************************************************

// There is no error handling at all. When a function fails, it returns proper value.
// For example, all create functions does return NULL on failure. Other return FALSE
// It may be interesting, for the developer, to know why the function is failing.
// for that reason, lcms2 does offer a logging function. This function does receive
// a ENGLISH string with some clues on what is going wrong. You can show this
// info to the end user, or just create some sort of log.
// The logging function should NOT terminate the program, as this obviously can leave
// resources. It is the programmer's responsibility to check each function return code
// to make sure it didn't fail.

// Error messages are limited to MAX_ERROR_MESSAGE_LEN

#define MAX_ERROR_MESSAGE_LEN   1024

// ---------------------------------------------------------------------------------------------------------

// This is our default log error
static void DefaultLogErrorHandlerFunction(cmsContext ContextID, cmsUInt32Number ErrorCode, const char *Text);

// Context0 storage, which is global
_cmsLogErrorChunkType _cmsLogErrorChunk = { DefaultLogErrorHandlerFunction };

// Allocates and inits error logger container for a given context. If src is NULL, only initializes the value
// to the default. Otherwise, it duplicates the value. The interface is standard across all context clients
void _cmsAllocLogErrorChunk(struct _cmsContext_struct* ctx,
                            const struct _cmsContext_struct* src)
{
    static _cmsLogErrorChunkType LogErrorChunk = { DefaultLogErrorHandlerFunction };
    void* from;

     if (src != NULL) {
        from = src ->chunks[Logger];
    }
    else {
       from = &LogErrorChunk;
    }

    ctx ->chunks[Logger] = _cmsSubAllocDup(ctx ->MemPool, from, sizeof(_cmsLogErrorChunkType));
}

// The default error logger does nothing.
static
void DefaultLogErrorHandlerFunction(cmsContext ContextID, cmsUInt32Number ErrorCode, const char *Text)
{
    // fprintf(stderr, "[lcms]: %s\n", Text);
    // fflush(stderr);

     cmsUNUSED_PARAMETER(ContextID);
     cmsUNUSED_PARAMETER(ErrorCode);
     cmsUNUSED_PARAMETER(Text);
}

// Change log error, context based
void CMSEXPORT cmsSetLogErrorHandlerTHR(cmsContext ContextID, cmsLogErrorHandlerFunction Fn)
{
    _cmsLogErrorChunkType* lhg = (_cmsLogErrorChunkType*) _cmsContextGetClientChunk(ContextID, Logger);

    if (lhg != NULL) {

        if (Fn == NULL)
            lhg -> LogErrorHandler = DefaultLogErrorHandlerFunction;
        else
            lhg -> LogErrorHandler = Fn;
    }
}

// Change log error, legacy
void CMSEXPORT cmsSetLogErrorHandler(cmsLogErrorHandlerFunction Fn)
{
    cmsSetLogErrorHandlerTHR(NULL, Fn);
}

// Log an error
// ErrorText is a text holding an english description of error.
void CMSEXPORT cmsSignalError(cmsContext ContextID, cmsUInt32Number ErrorCode, const char *ErrorText, ...)
{
    va_list args;
    char Buffer[MAX_ERROR_MESSAGE_LEN];
    _cmsLogErrorChunkType* lhg;

    va_start(args, ErrorText);
    vsnprintf(Buffer, MAX_ERROR_MESSAGE_LEN-1, ErrorText, args);
    va_end(args);

    // Check for the context, if specified go there. If not, go for the global
    lhg = (_cmsLogErrorChunkType*) _cmsContextGetClientChunk(ContextID, Logger);
    if (lhg ->LogErrorHandler) {
        lhg ->LogErrorHandler(ContextID, ErrorCode, Buffer);
    }
}

// Utility function to print signatures
void _cmsTagSignature2String(char String[5], cmsTagSignature sig)
{
    cmsUInt32Number be;

    // Convert to big endian
    be = _cmsAdjustEndianess32((cmsUInt32Number) sig);

    // Move chars
    memmove(String, &be, 4);

    // Make sure of terminator
    String[4] = 0;
}

//--------------------------------------------------------------------------------------------------

static
void* defMtxCreate(cmsContext id)
{
    _cmsMutex* ptr_mutex = (_cmsMutex*) _cmsMalloc(id, sizeof(_cmsMutex));
    _cmsInitMutexPrimitive(ptr_mutex);
    return (void*) ptr_mutex;
}

static
void defMtxDestroy(cmsContext id, void* mtx)
{
    _cmsDestroyMutexPrimitive((_cmsMutex *) mtx);
    _cmsFree(id, mtx);
}

static
cmsBool defMtxLock(cmsContext id, void* mtx)
{
    cmsUNUSED_PARAMETER(id);
    return _cmsLockPrimitive((_cmsMutex *) mtx) == 0;
}

static
void defMtxUnlock(cmsContext id, void* mtx)
{
    cmsUNUSED_PARAMETER(id);
    _cmsUnlockPrimitive((_cmsMutex *) mtx);
}

// Pointers to memory manager functions in Context0
_cmsMutexPluginChunkType _cmsMutexPluginChunk = { defMtxCreate, defMtxDestroy, defMtxLock, defMtxUnlock };

// Allocate and init mutex container.
void _cmsAllocMutexPluginChunk(struct _cmsContext_struct* ctx,
                                        const struct _cmsContext_struct* src)
{
    static _cmsMutexPluginChunkType MutexChunk = {defMtxCreate, defMtxDestroy, defMtxLock, defMtxUnlock };
    void* from;

     if (src != NULL) {
        from = src ->chunks[MutexPlugin];
    }
    else {
       from = &MutexChunk;
    }

    ctx ->chunks[MutexPlugin] = _cmsSubAllocDup(ctx ->MemPool, from, sizeof(_cmsMutexPluginChunkType));
}

// Register new ways to transform
cmsBool  _cmsRegisterMutexPlugin(cmsContext ContextID, cmsPluginBase* Data)
{
    cmsPluginMutex* Plugin = (cmsPluginMutex*) Data;
    _cmsMutexPluginChunkType* ctx = ( _cmsMutexPluginChunkType*) _cmsContextGetClientChunk(ContextID, MutexPlugin);

    if (Data == NULL) {

        // No lock routines
        ctx->CreateMutexPtr = NULL;
        ctx->DestroyMutexPtr = NULL;
        ctx->LockMutexPtr = NULL;
        ctx ->UnlockMutexPtr = NULL;
        return TRUE;
    }

    // Factory callback is required
    if (Plugin ->CreateMutexPtr == NULL || Plugin ->DestroyMutexPtr == NULL ||
        Plugin ->LockMutexPtr == NULL || Plugin ->UnlockMutexPtr == NULL) return FALSE;

    ctx->CreateMutexPtr  = Plugin->CreateMutexPtr;
    ctx->DestroyMutexPtr = Plugin ->DestroyMutexPtr;
    ctx ->LockMutexPtr   = Plugin ->LockMutexPtr;
    ctx ->UnlockMutexPtr = Plugin ->UnlockMutexPtr;

    // All is ok
    return TRUE;
}

// Generic Mutex fns
void* CMSEXPORT _cmsCreateMutex(cmsContext ContextID)
{
    _cmsMutexPluginChunkType* ptr = (_cmsMutexPluginChunkType*) _cmsContextGetClientChunk(ContextID, MutexPlugin);

    if (ptr ->CreateMutexPtr == NULL) return NULL;

    return ptr ->CreateMutexPtr(ContextID);
}

void CMSEXPORT _cmsDestroyMutex(cmsContext ContextID, void* mtx)
{
    _cmsMutexPluginChunkType* ptr = (_cmsMutexPluginChunkType*) _cmsContextGetClientChunk(ContextID, MutexPlugin);

    if (ptr ->DestroyMutexPtr != NULL) {

        ptr ->DestroyMutexPtr(ContextID, mtx);
    }
}

cmsBool CMSEXPORT _cmsLockMutex(cmsContext ContextID, void* mtx)
{
    _cmsMutexPluginChunkType* ptr = (_cmsMutexPluginChunkType*) _cmsContextGetClientChunk(ContextID, MutexPlugin);

    if (ptr ->LockMutexPtr == NULL) return TRUE;

    return ptr ->LockMutexPtr(ContextID, mtx);
}

void CMSEXPORT _cmsUnlockMutex(cmsContext ContextID, void* mtx)
{
    _cmsMutexPluginChunkType* ptr = (_cmsMutexPluginChunkType*) _cmsContextGetClientChunk(ContextID, MutexPlugin);

    if (ptr ->UnlockMutexPtr != NULL) {

        ptr ->UnlockMutexPtr(ContextID, mtx);
    }
}

// The global Context0 storage for parallelization plug-in
_cmsParallelizationPluginChunkType _cmsParallelizationPluginChunk = { 0 };

// Allocate parallelization container.
void _cmsAllocParallelizationPluginChunk(struct _cmsContext_struct* ctx,
                                         const struct _cmsContext_struct* src)
{
    if (src != NULL) {
        void* from = src->chunks[ParallelizationPlugin];
        ctx->chunks[ParallelizationPlugin] = _cmsSubAllocDup(ctx->MemPool, from, sizeof(_cmsParallelizationPluginChunkType));
    }
    else {
        _cmsParallelizationPluginChunkType ParallelizationPluginChunk = { 0 };
        ctx->chunks[ParallelizationPlugin] = _cmsSubAllocDup(ctx->MemPool, &ParallelizationPluginChunk, sizeof(_cmsParallelizationPluginChunkType));
    }
}

// Register parallel processing
cmsBool _cmsRegisterParallelizationPlugin(cmsContext ContextID, cmsPluginBase* Data)
{
    cmsPluginParalellization* Plugin = (cmsPluginParalellization*)Data;
    _cmsParallelizationPluginChunkType* ctx = (_cmsParallelizationPluginChunkType*)_cmsContextGetClientChunk(ContextID, ParallelizationPlugin);

    if (Data == NULL) {

        // No parallelization routines
        ctx->MaxWorkers = 0;
        ctx->WorkerFlags = 0;
        ctx->SchedulerFn = NULL;
        return TRUE;
    }

    // callback is required
    if (Plugin->SchedulerFn == NULL) return FALSE;

    ctx->MaxWorkers = Plugin->MaxWorkers;
    ctx->WorkerFlags = Plugin->WorkerFlags;
    ctx->SchedulerFn = Plugin->SchedulerFn;

    // All is ok
    return TRUE;
}

quality99%

¤ Dauer der Verarbeitung: 0.31 Sekunden (vorverarbeitet) ¤

Wurzel

Suchen

Beweissystem der NASA

Beweissystem Isabelle

NIST Cobol Testsuite

Cephes Mathematical Library

Wiener Entwicklungsmethode

Haftungshinweis

Die Informationen auf dieser Webseite wurden nach bestem Wissen sorgfältig zusammengestellt. Es wird jedoch weder Vollständigkeit, noch Richtigkeit, noch Qualität der bereit gestellten Informationen zugesichert.

Bemerkung:

Die farbliche Syntaxdarstellung ist noch experimentell.