orca/src/runtime_memory.c

67 lines
1.9 KiB
C

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