67 lines
1.8 KiB
C
67 lines
1.8 KiB
C
/************************************************************//**
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*
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* @file: runtime_memory.c
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* @author: Martin Fouilleul
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* @date: 17/04/2023
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*
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*****************************************************************/
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#include"runtime.h"
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void* wasm_memory_resize_callback(void* p, unsigned long size, void* userData)
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{
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wasm_memory* memory = (wasm_memory*)userData;
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if(memory->committed >= size)
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{
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return(memory->ptr);
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}
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else if(memory->committed < memory->reserved)
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{
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u32 commitSize = size - memory->committed;
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oc_base_allocator* allocator = oc_base_allocator_default();
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oc_base_commit(allocator, memory->ptr + memory->committed, commitSize);
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memory->committed += commitSize;
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return(memory->ptr);
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}
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else
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{
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OC_ABORT("Out of memory");
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return(0);
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}
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}
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void wasm_memory_free_callback(void* p, void* userData)
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{
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wasm_memory* memory = (wasm_memory*)userData;
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oc_base_allocator* allocator = oc_base_allocator_default();
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oc_base_release(allocator, memory->ptr, memory->reserved);
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memset(memory, 0, sizeof(wasm_memory));
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}
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extern u32 oc_mem_grow(u64 size)
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{
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oc_runtime_env* runtime = oc_runtime_env_get();
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wasm_memory* memory = &runtime->wasmMemory;
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size = oc_align_up_pow2(size, d_m3MemPageSize);
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u64 totalSize = size + m3_GetMemorySize(runtime->m3Runtime);
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u32 addr = memory->committed;
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//NOTE: call resize memory, which will call our custom resize callback... this is a bit involved because
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// wasm3 doesn't allow resizing the memory directly
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M3Result res = ResizeMemory(runtime->m3Runtime, totalSize/d_m3MemPageSize);
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return(addr);
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}
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void* wasm_memory_offset_to_ptr(wasm_memory* memory, u32 offset)
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{
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M3MemoryHeader* header = (M3MemoryHeader*)(memory->ptr);
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OC_DEBUG_ASSERT(offset < header->length, "Wasm offset exceeds memory length");
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return memory->ptr + sizeof(M3MemoryHeader) + offset;
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}
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