/****************************************************************************
Copyright (c) 2010, Radon Labs GmbH
Copyright (c) 2011-2013,WebJet Business Division,CYOU
 
http://www.genesis-3d.com.cn

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 "stdneb.h"
#include "memory/osx/osxheap.h"
#include "core/sysfunc.h"

namespace OSX
{

#if NEBULA3_MEMORY_STATS
List<OSXHeap*>* OSXHeap::list = 0;
CriticalSection* OSXHeap::criticalSection = 0;
#endif

//------------------------------------------------------------------------------
/**
    This method must be called at the beginning of the application before
    any threads are spawned.
 */
void
OSXHeap::Setup()
{
    #if NEBULA3_MEMORY_STATS
    n_assert(0 == list);
    n_assert(0 == criticalSection);
    list = n_new(List<OSXHeap*>);
    criticalSection = n_new(CriticalSection);
    #endif
}
    
//------------------------------------------------------------------------------
/**
*/
OSXHeap::OSXHeap(const char* heapName, size_t initialSize)
{
    n_assert(0 != heapName);
    this->name = heapName;
    this->heapZone = malloc_create_zone(initialSize, 0);
    
    #if NEBULA3_MEMORY_STATS
    n_assert(0 != criticalSection);
    this->allocCount = 0;
    this->allocSize = 0;
    criticalSection->Enter();
    this->listIterator = list->AddBack(this);
    criticalSection->Leave();
    #endif
}

//------------------------------------------------------------------------------
/**
*/
OSXHeap::~OSXHeap()
{
    #if NEBULA3_MEMORY_STATS
    this->DumpLeaks();
    #endif
    
    malloc_destroy_zone(this->heapZone);
    this->heapZone = 0;
    
    // dump memory leaks and unlink from heap list
    #if NEBULA3_MEMORY_STATS
    n_assert(0 == this->allocCount);
    n_assert(0 != criticalSection);
    n_assert(0 != this->listIterator);
    criticalSection->Enter();
    list->Remove(this->listIterator);
    criticalSection->Leave();
    this->listIterator = 0;
    #endif   
}

//------------------------------------------------------------------------------
/**
*/
void*
OSXHeap::Alloc(size_t size, size_t alignment)
{
    void* allocPtr = malloc_zone_memalign(this->heapZone, alignment, size);
    if (0 == allocPtr)
    {
        n_error("OSXHeap::Alloc(): Out of mem on heap '%s', trying to allocate %i bytes!\n", this->name, int(size));
    }
    #if NEBULA3_MEMORY_STATS
    size_t allocatedSize = malloc_size(allocPtr);
    Threading::Interlocked::Increment(this->allocCount);
    Threading::Interlocked::Add(this->allocSize, allocatedSize);
    #endif
    return allocPtr;
}
        
//------------------------------------------------------------------------------
/**
*/
void*
OSXHeap::Realloc(void* ptr, size_t size)
{
    #if NEBULA3_MEMORY_STATS
    size_t oldSize = malloc_size(ptr);
    #endif
    void* allocPtr = malloc_zone_realloc(this->heapZone, ptr, size);
    if (0 == allocPtr)
    {
        n_error("OSXHeap::Realloc(): Out of memory on heap '%s', trying to re-alloc %i bytes!\n", this->name, (int)size);
    }
    #if NEBULA3_MEMORY_STATS
    size_t newSize = malloc_size(ptr);
    Threading::Interlocked::Add(this->allocSize, int(newSize - oldSize));
    #endif
    return allocPtr;
}

//------------------------------------------------------------------------------
/**
*/
void
OSXHeap::Free(void* ptr)
{
    n_assert(0 != ptr);
    #if NEBULA3_MEMORY_STATS
    size_t allocSize = malloc_size(ptr);
    Threading::Interlocked::Add(this->allocSize, -int(allocSize));
    Threading::Interlocked::Decrement(this->allocCount);
    #endif
    malloc_zone_free(this->heapZone, ptr);
}

#if NEBULA3_MEMORY_STATS
//------------------------------------------------------------------------------
/**
    Validate the heap. This walks over the heap's memory block and checks
    the control structures. If somethings wrong the function will
    stop the program, otherwise the functions returns true.
*/
bool
OSXHeap::ValidateHeap() const
{
    return malloc_zone_check(this->heapZone);
}

//------------------------------------------------------------------------------
/**
*/
int
OSXHeap::GetAllocCount() const
{
    return this->allocCount;
}
    
//------------------------------------------------------------------------------
/**
*/
int
OSXHeap::GetAllocSize() const
{
    return this->allocSize;
}
    
//------------------------------------------------------------------------------
/**
*/
Array<OSXHeap::Stats>
OSXHeap::GetAllHeapStats()
{
    n_assert(0 != criticalSection);
    Array<Stats> result;
    criticalSection->Enter();
    List<OSXHeap*>::Iterator iter;
    for (iter = list->Begin(); iter != list->End(); iter++)
    {
        Stats stats;
        stats.name = (*iter)->GetName();
        stats.allocCount = (*iter)->GetAllocCount();
        stats.allocSize = (*iter)->GetAllocSize();
        result.Append(stats);
    }
    criticalSection->Leave();
    return result
}
        
//------------------------------------------------------------------------------
/**
    This static method calls the ValidateHeap() method on all heaps.
*/
bool
OSXHeap::ValidateAllHeaps()
{
    n_assert(0 != criticalSection);
    criticalSection->Enter();
    bool result = true;
    List<OSXHeap*>::Iterator iter;
    for (iter = list->Begin(); iter != list->End(); iter++)
    {
        result &= (*iter)->ValidateHeap();
    }
    criticalSection->Leave();
    return result;
}
    
//------------------------------------------------------------------------------
/**
    Generates a memory leak report for this heap.
*/
void
OSXHeap::DumpLeaks()
{
    Core::SysFunc::Error("OSXHeap::DumpLeaks() not implemented!\n");
}

//------------------------------------------------------------------------------
/**
    Generates memory leaks for every heap object.
*/
void
OSXHeap::DumpLeaksAllHeaps()
{
    n_assert(0 != criticalSection);
    criticalSection->Enter();
    List<OSXHeap*>::Iterator iter;
    for (iter = list->Begin(); iter != list->End(); iter++)
    {
        (*iter)->DumpLeaks();
    }
    criticalSection->Leave();
}
#endif // NEBULA3_MEMORY_STATS

} // namespace Memory