🛠️🐜 Antkeeper superbuild with dependencies included
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108 lines
2.2 KiB
108 lines
2.2 KiB
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#include "config.h"
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#include "almalloc.h"
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#include <cstdlib>
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#include <cstring>
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#ifdef HAVE_MALLOC_H
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#include <malloc.h>
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#endif
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#ifdef HAVE_WINDOWS_H
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#include <windows.h>
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#else
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#include <unistd.h>
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#endif
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#ifdef __GNUC__
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#define LIKELY(x) __builtin_expect(!!(x), !0)
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#define UNLIKELY(x) __builtin_expect(!!(x), 0)
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#else
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#define LIKELY(x) (!!(x))
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#define UNLIKELY(x) (!!(x))
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#endif
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void *al_malloc(size_t alignment, size_t size)
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{
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#if defined(HAVE_ALIGNED_ALLOC)
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size = (size+(alignment-1))&~(alignment-1);
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return aligned_alloc(alignment, size);
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#elif defined(HAVE_POSIX_MEMALIGN)
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void *ret;
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if(posix_memalign(&ret, alignment, size) == 0)
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return ret;
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return nullptr;
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#elif defined(HAVE__ALIGNED_MALLOC)
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return _aligned_malloc(size, alignment);
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#else
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char *ret = static_cast<char*>(malloc(size+alignment));
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if(ret != nullptr)
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{
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*(ret++) = 0x00;
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while(((ptrdiff_t)ret&(alignment-1)) != 0)
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*(ret++) = 0x55;
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}
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return ret;
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#endif
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}
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void *al_calloc(size_t alignment, size_t size)
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{
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void *ret = al_malloc(alignment, size);
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if(ret) memset(ret, 0, size);
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return ret;
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}
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void al_free(void *ptr) noexcept
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{
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#if defined(HAVE_ALIGNED_ALLOC) || defined(HAVE_POSIX_MEMALIGN)
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free(ptr);
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#elif defined(HAVE__ALIGNED_MALLOC)
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_aligned_free(ptr);
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#else
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if(ptr != nullptr)
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{
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char *finder = static_cast<char*>(ptr);
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do {
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--finder;
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} while(*finder == 0x55);
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free(finder);
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}
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#endif
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}
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size_t al_get_page_size() noexcept
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{
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static size_t psize = 0;
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if(UNLIKELY(!psize))
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{
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#ifdef HAVE_SYSCONF
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#if defined(_SC_PAGESIZE)
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if(!psize) psize = sysconf(_SC_PAGESIZE);
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#elif defined(_SC_PAGE_SIZE)
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if(!psize) psize = sysconf(_SC_PAGE_SIZE);
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#endif
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#endif /* HAVE_SYSCONF */
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#ifdef _WIN32
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if(!psize)
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{
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SYSTEM_INFO sysinfo{};
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GetSystemInfo(&sysinfo);
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psize = sysinfo.dwPageSize;
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}
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#endif
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if(!psize) psize = DEF_ALIGN;
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}
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return psize;
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}
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int al_is_sane_alignment_allocator() noexcept
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{
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#if defined(HAVE_ALIGNED_ALLOC) || defined(HAVE_POSIX_MEMALIGN) || defined(HAVE__ALIGNED_MALLOC)
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return 1;
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#else
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return 0;
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#endif
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}
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