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add MM::Native functions for memory allocation

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This commit is contained in:
Kelvin Sherlock 2013-02-17 13:03:03 -05:00
parent 53c42e1ee2
commit 4f4fde9cfb
2 changed files with 69 additions and 28 deletions
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86
toolbox/mm.cpp
View File

@ -70,6 +70,46 @@ namespace
namespace MM
{
namespace Native {
uint16_t NewPtr(uint32_t size, uint32_t &mcptr)
{
// native pointers.
mcptr = 0;
if (size == 0) return 0;
uint8_t *ptr = nullptr;
ptr = (uint8_t *)mplite_malloc(&pool, size);
if (!ptr)
{
return memFullErr;
}
mcptr = ptr - Memory;
PtrMap.emplace(std::make_pair(mcptr, size));
return 0;
}
uint16_t DisposePtr(uint32_t mcptr)
{
auto iter = PtrMap.find(mcptr);
if (iter == PtrMap.end()) return memWZErr;
PtrMap.erase(iter);
uint8_t *ptr = mcptr + Memory;
mplite_free(&pool, ptr);
return 0;
}
}
bool Init(uint8_t *memory, uint32_t memorySize, uint32_t reserved)
{
int ok;
@ -152,6 +192,8 @@ namespace MM
#pragma mark Pointers
uint16_t NewPtr(uint16_t trap)
{
/*
@ -164,6 +206,7 @@ namespace MM
*
*/
bool clear = trap & (1 << 9);
//bool sys = trap & (1 << 10);
@ -174,29 +217,22 @@ namespace MM
// todo -- separate pools for sys vs non-sys?
// todo -- NewPtr(0) -- null or empty ptr?
if (size == 0)
uint32_t mcptr;
uint16_t error;
error = Native::NewPtr(size, mcptr);
if (!error)
{
cpuSetAReg(0, 0);
return SetMemError(0);
if (clear && mcptr)
{
uint8_t *ptr = memoryPointer(mcptr);
std::memset(ptr, 0, size);
}
}
uint8_t *ptr = nullptr;
ptr = (uint8_t *)mplite_malloc(&pool, size);
if (!ptr)
{
cpuSetAReg(0, 0);
return SetMemError(memFullErr);
}
if (clear)
{
std::memset(ptr, 0, size);
}
uint32_t mcptr = ptr - Memory;
PtrMap.emplace(std::make_pair(mcptr, size));
cpuSetAReg(0, mcptr);
return SetMemError(0);
return SetMemError(error);
}
uint16_t DisposePtr(uint16_t trap)
@ -215,16 +251,10 @@ namespace MM
Log("%04x DisposePtr(%08x)\n", trap, mcptr);
auto iter = PtrMap.find(mcptr);
uint16_t error;
error = Native::DisposePtr(mcptr);
if (iter == PtrMap.end()) return SetMemError(memWZErr);
PtrMap.erase(iter);
uint8_t *ptr = mcptr + Memory;
mplite_free(&pool, ptr);
return SetMemError(0);
return SetMemError(error);
}
uint32_t GetPtrSize(uint16_t trap)

11
toolbox/mm.h
View File

@ -13,6 +13,17 @@ namespace MM
bool Init(uint8_t *memory, uint32_t memorySize, uint32_t reserved);
// native functions.
namespace Native
{
uint16_t NewHandle(uint32_t size, uint32_t &handle);
uint16_t NewPtr(uint32_t size, uint32_t &pointer);
uint16_t DisposeHandle(uint32_t handle);
uint16_t DisposePtr(uint32_t pointer);
}
uint16_t BlockMove(uint16_t trap);
uint32_t CompactMem(uint16_t trap);