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61 lines
1.4 KiB
C
61 lines
1.4 KiB
C
/**
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* Jingga
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*
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* @copyright Jingga
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* @license OMS License 2.0
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* @version 1.0.0
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* @link https://jingga.app
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*/
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#ifndef TOS_PLATFORM_LINUX_ALLOCATION_H
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#define TOS_PLATFORM_LINUX_ALLOCATION_H
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#include <unistd.h>
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#include <sys/mman.h>
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inline
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void aligned_free(void** ptr) {
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free(*ptr);
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*ptr = NULL;
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}
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inline
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void* platform_alloc(size_t size)
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{
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ssize_t page_size = sysconf(_SC_PAGESIZE);
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size = (size + page_size - 1) & ~(page_size - 1);
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return mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
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}
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inline
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void* platform_alloc_aligned(size_t size, int32 alignment)
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{
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ssize_t page_size = sysconf(_SC_PAGESIZE);
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if (alignment < page_size) {
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alignment = page_size;
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}
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size = (size + alignment - 1) & ~(alignment - 1);
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void* ptr = mmap(NULL, size + alignment + sizeof(void*), PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
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void* aligned_ptr = (void*)(((uintptr_t)ptr + alignment + sizeof(void*) - 1) & ~(alignment - 1));
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((void**) aligned_ptr)[-1] = ptr;
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return aligned_ptr;
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}
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inline
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void platform_free(void** ptr, size_t size) {
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munmap(*ptr, size);
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*ptr = NULL;
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}
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inline
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void platform_aligned_free(void** aligned_ptr, size_t size) {
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void* ptr = ((void**) *aligned_ptr)[-1];
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munmap(ptr, size + ((uintptr_t) *aligned_ptr - (uintptr_t)ptr));
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*aligned_ptr = NULL;
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}
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#endif |