/****************************************************************************
This source file is part of OGRE
(Object-oriented Graphics Rendering Engine)
For the latest info, see http://www.ogre3d.org/

Copyright (c) 2000-2014 Torus Knot Software Ltd

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

#if (CC_MEMORY_ALLOCATOR == CC_MEMORY_ALLOCATOR_JEMALLOC)

    #include "jemalloc/jemalloc.h"
extern const char *je_malloc_conf = "narenas:4";

namespace cc {

    #ifdef CC_MEMORY_TRACKER
        #define MEM_CHECKTAG_SIZE 4
        #define MEM_CHECKTAG      0x20170719

inline static void CheckOverflowAlloc(void *ptr) {
    size_t size = je_malloc_usable_size(ptr);
    char *p = (char *)ptr + size - MEM_CHECKTAG_SIZE;
    uint tag = MEM_CHECKTAG;
    memcpy(p, &tag, MEM_CHECKTAG_SIZE);
}

inline static void CheckOverflowFree(void *ptr) {
    size_t size = je_malloc_usable_size(ptr);
    char *p = (char *)ptr + size - MEM_CHECKTAG_SIZE;
    uint tag;
    memcpy(&tag, p, MEM_CHECKTAG_SIZE);
    CCASSERT(tag == MEM_CHECKTAG);
}

    #else
        #define MEM_CHECKTAG_SIZE 0
    #endif

CC_DECL_MALLOC void *JeAllocImpl::AllocBytes(size_t count, const char *file, int line, const char *func) {
    void *ptr = je_malloc(count + MEM_CHECKTAG_SIZE);
    #ifdef CC_MEMORY_TRACKER
    CheckOverflowAlloc(ptr);
    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 *JeAllocImpl::ReallocBytes(void *ptr, size_t count, const char *file, int line, const char *func) {
    #ifdef CC_MEMORY_TRACKER
    if (ptr) {
        if (count == 0) {
            CheckOverflowFree(ptr);
            MemTracker::Instance()->RecordFree(ptr);
            je_free(ptr);
            return nullptr;
        } else {
            size_t oldsz = je_malloc_usable_size(ptr) - MEM_CHECKTAG_SIZE;
            if (oldsz > count) oldsz = count;

            void *nptr = je_malloc(count + MEM_CHECKTAG_SIZE);
            memcpy(nptr, ptr, oldsz);
            CheckOverflowAlloc(nptr);
            MemTracker::Instance()->RecordAlloc(nptr, count, file, line, func);

            CheckOverflowFree(ptr);
            MemTracker::Instance()->RecordFree(ptr);
            je_free(ptr);
            return nptr;
        }
    } else {
        if (count) {
            ptr = je_malloc(count + MEM_CHECKTAG_SIZE);
            CheckOverflowAlloc(ptr);
            MemTracker::Instance()->RecordAlloc(ptr, count, file, line, func);
            return ptr;
        } else {
            return nullptr;
        }
    }
    #else
    // avoid unused params warning
    (void)file;
    (void)line;
    (void)func;
    return je_realloc(ptr, count);
    #endif
}

CC_DECL_MALLOC void *JeAllocImpl::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 = je_aligned_alloc(align, count + MEM_CHECKTAG_SIZE);
    #ifdef COCOS_MEMORY_TRACKER
    CheckOverflowAlloc(ptr);
    MemTracker::Instance()->RecordAlloc(ptr, count, file, line, func);
    #else
    // avoid unused params warning
    (void)file;
    (void)line;
    (void)func;
    #endif
    return ptr;
}

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

struct JeDumpData {
    char *buf;
    int size;
};

static void JeStatsPrint(void *param, const char *msg) {
    JeDumpData *jd = (JeDumpData *)param;
    if (jd->size == 0) return;

    int len = (int)strlen(msg);
    if (len > jd->size) len = jd->size;
    memcpy(jd->buf, msg, len);
    jd->buf[len] = 0;
    jd->buf += len;
    jd->size -= len;
}

void JeAllocImpl::DumpStats(char *buf, int bufsize) {
    JeDumpData jd;
    jd.buf = buf;
    jd.size = bufsize - 1;
    je_malloc_stats_print(JeStatsPrint, &jd, "ma");
}

void JeAllocImpl::TrimAlloc() {
    int narenas = 0;
    size_t sz = sizeof(narenas);
    je_mallctl("arenas.narenas", (void *)&narenas, &sz, nullptr, 0);
    char buf[24];
    sprintf(buf, "arena.%d.purge", narenas);
    printf("jemalloc trim: %s\n", buf);
    je_mallctl(buf, NULL, NULL, NULL, 0);
}

} // namespace cc

#endif // end - #ifdef CC_MEMORY_ALLOCATOR_JEMALLOC