Does memFree really need OS?

[tehKaiN]

Apparently calling FreeMem when OS is disabled doesn't crash the system. Calling systemUse() could be avoided to improve performance.

• Create a test which repeatedly allocates deallocates memory
  • Deallocate CHIP mem
  • Deallocate FAST mem
  • Launch when OS is fresh
  • Launch after OS have had its memory almost full and then freed some things
• Check on KS1.3 when booting exe directly from startup sequence
• Check on KS1.3 when launching from OS
• Check on KS2.0
• Check on KS 3.1

[tehKaiN]

I've built GermZ without enabling OS for allocations - there were only 10 allocs of that kind, but the game ran stable on KS1.3 512+512 from HDD.

[Ozzyboshi]

I built my custom ACE with this modifications:

• memory.c : systemuse() and systemunuse() commented out inside void *_memAllocRls(ULONG ulSize, ULONG ulFlags) and void _memFreeRls(void *pMem, ULONG ulSize)

• bitmap.c : systemuse() and systemunuse() commented out inside void bitmapDestroy(tBitMap *pBitMap)

The final executable works just fine on my amigas compiling and linking with -mcrt=nix13 (both ace and my demo), since there are very big blocks of allocs and deallocs (192K) I am very optimistic that systemunuse()/use() can be avoided.

Tested on:
Real a600 + ks 2.4 (2mb chip+2mb fast)
Emulated A1200 + ks 3.1 (2mb chip + 8 mb fast)
Real 500 plus with aca 500 plus + ks 1.3