cocos-engine/native/cocos/base/memory/NedPooling.cpp

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#include "base/CoreStd.h"
#include "NedPooling.h"
#include "MemTracker.h"

#if (CC_MEMORY_ALLOCATOR == CC_MEMORY_ALLOCATOR_NEDPOOLING)

    // include Ned implementation
    #if (CC_COMPILER == CC_COMPILER_MSVC)
        #pragma warning(disable : 4005 4189 4267 4565 4702 4706)
    #endif

    #define USE_LOCKS 1
    #define INSECURE  1
    #include <nedmalloc.c>

namespace cc {

namespace nedPoolingIntern {

const size_t ned_poolCount = 14; // Needs to be greater than 4
    #if (CC_CPU_ARCH == CC_CPU_ARCH_32)
void *ned_poolFootprint = reinterpret_cast<void *>(0xBB1AA45A);
    #else
void *ned_poolFootprint = reinterpret_cast<void *>((ui64)0xBB1AA45A);
    #endif
nedalloc::nedpool *ned_pools[ned_poolCount + 1] = {0};
nedalloc::nedpool *ned_poolsAligned[ned_poolCount + 1] = {0};

size_t PoolIDFromSize(size_t a_reqSize) {
    // Requests size 16 or smaller are allocated at a 4 byte granularity.
    // Requests size 17 or larger are allocated at a 16 byte granularity.
    // With a ned_poolCount of 14, requests size 177 or larger go in the default pool.

    // spreadsheet style =IF(B35<=16; FLOOR((B35-1)/4;1); MIN(FLOOR((B35-1)/16; 1) + 3; 14))

    size_t poolID = 0;

    if (a_reqSize > 0) {
        if (a_reqSize <= 16) {
            poolID = (a_reqSize - 1) >> 2;
        } else {
            poolID = std::min<size_t>(((a_reqSize - 1) >> 4) + 3, ned_poolCount);
        }
    }

    return poolID;
}

CC_DECL_MALLOC void *InternalAlloc(size_t a_reqSize) {
    size_t poolID = PoolIDFromSize(a_reqSize);
    nedalloc::nedpool *pool(0); // A pool pointer of 0 means the default pool.

    if (poolID < ned_poolCount) {
        if (ned_pools[poolID] == 0) {
            // Init pool if first use

            ned_pools[poolID] = nedalloc::nedcreatepool(0, 8);
            nedalloc::nedpsetvalue(ned_pools[poolID], ned_poolFootprint); // All pools are stamped with a footprint
        }

        pool = ned_pools[poolID];
    }

    return nedalloc::nedpmalloc(pool, a_reqSize);
}

CC_DECL_MALLOC void *InternalRealloc(void *ptr, size_t a_reqSize) {
    size_t poolID = PoolIDFromSize(a_reqSize);
    nedalloc::nedpool *pool(0); // A pool pointer of 0 means the default pool.

    if (poolID < ned_poolCount) {
        if (ned_pools[poolID] == 0) {
            // Init pool if first use

            ned_pools[poolID] = nedalloc::nedcreatepool(0, 8);
            nedalloc::nedpsetvalue(ned_pools[poolID], ned_poolFootprint); // All pools are stamped with a footprint
        }

        pool = ned_pools[poolID];
    }

    return nedalloc::nedprealloc(pool, ptr, a_reqSize);
}

CC_DECL_MALLOC void *InternalAllocAligned(size_t a_align, size_t a_reqSize) {
    size_t poolID = PoolIDFromSize(a_reqSize);
    nedalloc::nedpool *pool(0); // A pool pointer of 0 means the default pool.

    if (poolID < ned_poolCount) {
        if (ned_poolsAligned[poolID] == 0) {
            // Init pool if first use

            ned_poolsAligned[poolID] = nedalloc::nedcreatepool(0, 8);
            nedalloc::nedpsetvalue(ned_poolsAligned[poolID], ned_poolFootprint); // All pools are stamped with a footprint
        }

        pool = ned_poolsAligned[poolID];
    }

    return nedalloc::nedpmemalign(pool, a_align, a_reqSize);
}

void InternalFree(void *a_mem) {
    if (a_mem) {
        nedalloc::nedpool *pool(0);

        // nedalloc lets us get the pool pointer from the memory pointer
        void *footprint = nedalloc::nedgetvalue(&pool, a_mem);

        // Check footprint
        if (footprint == ned_poolFootprint) {
            // If we allocated the pool, deallocate from this pool...
            nedalloc::nedpfree(pool, a_mem);
        } else {
            // ...otherwise let nedalloc handle it.
            nedalloc::nedfree(a_mem);
        }
    }
}

} // namespace nedPoolingIntern

//////////////////////////////////////////////////////////////////////////

CC_DECL_MALLOC void *NedPoolingImpl::AllocBytes(size_t count, const char *file, int line, const char *func) {
    void *ptr = nedPoolingIntern::InternalAlloc(count);
    #ifdef CC_MEMORY_TRACKER
    MemTracker::Instance()->RecordAlloc(ptr, count, file, line, func);
    #else
    // avoid unused params warning
    (void)file;
    (void)line;
    (void)func;
    #endif
    return ptr;
}

CC_DECL_MALLOC void *NedPoolingImpl::ReallocBytes(void *ptr, size_t count, const char *file, int line, const char *func) {
    #ifdef CC_MEMORY_TRACKER
    if (ptr) {
        if (count == 0) {
            MemTracker::Instance()->RecordFree(ptr);
            nedPoolingIntern::InternalFree(ptr);
            return nullptr;
        } else {
            int oldsz = MemTracker::Instance()->GetAllocSize(ptr);
            if (oldsz < 0) {
                CCASSERT(false, "ned realloc: get old size of ptr fail!");
                return realloc(ptr, count);
            } else {
                if (oldsz > (int)count) oldsz = (int)count;
            }

            void *nptr = nedPoolingIntern::InternalAlloc(count);
            memcpy(nptr, ptr, oldsz);
            MemTracker::Instance()->RecordAlloc(nptr, count, file, line, func);
            MemTracker::Instance()->RecordFree(ptr);
            nedPoolingIntern::InternalFree(ptr);
            return nptr;
        }
    } else {
        if (count) {
            ptr = nedPoolingIntern::InternalAlloc(count);
            MemTracker::Instance()->RecordAlloc(ptr, count, file, line, func);
            return ptr;
        } else {
            return nullptr;
        }
    }
    #else
    return nedPoolingIntern::InternalRealloc(ptr, count);
    #endif
}

CC_DECL_MALLOC void *NedPoolingImpl::AllocBytesAligned(size_t align, size_t count, const char *file, int line, const char *func) {
    // default to platform SIMD alignment if none specified
    void *ptr = nedPoolingIntern::InternalAllocAligned(align, count);
    #ifdef CC_MEMORY_TRACKER
    MemTracker::Instance()->RecordAlloc(ptr, count, file, line, func);
    #else
    // avoid unused params warning
    (void)file;
    (void)line;
    (void)func;
    #endif
    return ptr;
}

void NedPoolingImpl::DeallocBytes(void *ptr) {
    // deal with null
    if (!ptr) {
        return;
    }
    #ifdef CC_MEMORY_TRACKER
    MemTracker::Instance()->RecordFree(ptr);
    #endif
    nedPoolingIntern::InternalFree(ptr);
}

} // namespace cc

#endif // end - #ifdef CC_MEMORY_ALLOCATOR_NEDPOOLING