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MM::Native::ResizeHandle and ReallocHandle (for resource manager)

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This commit is contained in:
Kelvin Sherlock 2013-08-03 19:18:50 -04:00
parent 2bd086232b
commit 75606c72e2
2 changed files with 166 additions and 1 deletions
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163
toolbox/mm.cpp
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@ -273,6 +273,8 @@ namespace MM
ptr = nullptr;
// todo -- size 0 should have a ptr to differentiate
// from purged.
if (size)
{
ptr = (uint8_t *)mplite_malloc(&pool, size);
@ -334,7 +336,158 @@ namespace MM
if (iter == HandleMap.end()) return SetMemError(MacOS::memWZErr);
handleSize = iter->second.size;
return SetMemError(0);
}
}
uint16_t ReallocHandle(uint32_t handle, uint32_t logicalSize)
{
auto iter = HandleMap.find(handle);
if (iter == HandleMap.end()) return SetMemError(MacOS::memWZErr);
auto& info = iter->second;
if (info.locked) return SetMemError(MacOS::memLockedErr);
uint32_t mcptr = 0;
if (logicalSize)
{
// todo -- purge & retry on failure.
void *address = mplite_malloc(&pool, logicalSize);
if (!address) return SetMemError(MacOS::memFullErr);
mcptr = (uint8_t *)address - Memory;
}
// the handle is not altered in the event of an error.
if (info.address)
{
void *address = Memory + info.address;
mplite_free(&pool, address);
}
info.address = mcptr;
info.size = logicalSize;
memoryWriteLong(mcptr, handle);
// lock? clear purged flag?
return 0;
}
uint16_t SetHandleSize(uint32_t handle, uint32_t newSize)
{
const auto iter = HandleMap.find(handle);
if (iter == HandleMap.end()) return SetMemError(MacOS::memWZErr);
auto &info = iter->second;
// 0 - no change in size.
if (info.size == newSize) return SetMemError(0);
uint32_t mcptr = info.address;
uint8_t *ptr = mcptr + Memory;
// 1. - resizing to 0.
if (!newSize)
{
if (info.locked) return SetMemError(MacOS::memLockedErr);
// todo -- size 0 should have a ptr to differentiate
// from purged.
mplite_free(&pool, ptr);
info.address = 0;
info.size = 0;
memoryWriteLong(info.address, handle);
return SetMemError(0);
}
// 2. - resizing from 0.
if (!mcptr)
{
if (info.locked) return SetMemError(MacOS::memLockedErr);
ptr = (uint8_t *)mplite_malloc(&pool, newSize);
if (!ptr) return SetMemError(MacOS::memFullErr);
mcptr = ptr - Memory;
info.address = mcptr;
info.size = newSize;
memoryWriteLong(info.address, handle);
return SetMemError(0);
}
for (unsigned i = 0; i < 2; ++i)
{
// 3. - locked
if (info.locked)
{
if (mplite_resize(&pool, ptr, mplite_roundup(&pool, newSize)) == MPLITE_OK)
{
info.size = newSize;
return SetMemError(0);
}
}
else
{
// 4. - resize.
ptr = (uint8_t *)mplite_realloc(&pool, ptr, mplite_roundup(&pool, newSize));
if (ptr)
{
mcptr = ptr - Memory;
info.address = mcptr;
info.size = newSize;
memoryWriteLong(info.address, handle);
return SetMemError(0);
}
}
fprintf(stderr, "mplite_realloc failed.\n");
Native::PrintMemoryStats();
if (i > 0) return SetMemError(MacOS::memFullErr);
// purge...
for (auto & kv : HandleMap)
{
uint32_t ph = kv.first;
auto &info = kv.second;
if (ph == handle) continue;
if (info.size && info.purgeable && !info.locked)
{
mplite_free(&pool, Memory + info.address);
info.size = 0;
info.address = 0;
// also need to update memory
memoryWriteLong(0, ph);
}
}
}
return SetMemError(MacOS::memFullErr);
}
uint16_t HSetRBit(uint32_t handle)
{
const auto iter = HandleMap.find(handle);
@ -786,6 +939,9 @@ namespace MM
Log("%04x ReallocHandle(%08x, %08x)\n", trap, hh, logicalSize);
return Native::ReallocHandle(hh, logicalSize);
#if 0
auto iter = HandleMap.find(hh);
if (iter == HandleMap.end()) return SetMemError(MacOS::memWZErr);
@ -821,6 +977,7 @@ namespace MM
// lock? clear purged flag?
return 0;
#endif
}
@ -865,6 +1022,9 @@ namespace MM
Log("%04x SetHandleSize(%08x, %08x)\n", trap, hh, newSize);
return Native::SetHandleSize(hh, newSize);
#if 0
auto iter = HandleMap.find(hh);
if (iter == HandleMap.end()) return SetMemError(MacOS::memWZErr);
@ -968,6 +1128,7 @@ namespace MM
}
return SetMemError(MacOS::memFullErr);
#endif
}

4
toolbox/mm.h
View File

@ -21,6 +21,10 @@ namespace MM
uint16_t DisposePtr(uint32_t pointer);
uint16_t GetHandleSize(uint32_t handle, uint32_t &handleSize);
uint16_t SetHandleSize(uint32_t handle, uint32_t newSize);
uint16_t ReallocHandle(uint32_t handle, uint32_t newSize);
uint16_t HSetRBit(uint32_t handle);
uint16_t HClrRBit(uint32_t handle);