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Now counting memory usage in a more solid manner.

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This commit is contained in:
Jonas 'Sortie' Termansen 2011-12-23 16:45:07 +01:00
parent ba9b715c59
commit ffe3cc49f2
1 changed files with 4 additions and 10 deletions
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14
sortix/x86-family/memorymanagement.cpp
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@ -44,7 +44,6 @@ namespace Sortix
size_t stackused;
size_t stacklength;
size_t totalmem;
size_t pagesallocated;
}
namespace Memory
@ -70,9 +69,6 @@ namespace Sortix
Page::pagesnotonstack = 0;
Page::totalmem = 0;
// The first mebibytes are reserved for use by the kernel.
Page::pagesallocated = kernelend >> 12UL;
if ( !( bootinfo->flags & MULTIBOOT_INFO_MEM_MAP ) )
{
Panic("memorymanagement.cpp: The memory map flag was't set in "
@ -97,7 +93,7 @@ namespace Sortix
// The kernel's code may split this memory area into multiple pieces.
addr_t base = (addr_t) mmap->addr;
size_t length = mmap->len;
size_t length = Page::AlignDown(mmap->len);
#ifdef PLATFORM_X86
// Figure out if the memory area is addressable (are our pointers big enough?)
@ -173,7 +169,9 @@ namespace Sortix
void Statistics(size_t* amountused, size_t* totalmem)
{
if ( amountused ) { *amountused = Page::pagesallocated << 12Ul; }
size_t memfree = Page::stackused << 12UL;
size_t memused = Page::totalmem - memfree;
if ( amountused ) { *amountused = memused; }
if ( totalmem ) { *totalmem = Page::totalmem; }
}
@ -267,16 +265,12 @@ namespace Sortix
addr_t Get()
{
if ( unlikely(stackused == 0) ) { Error::Set(ENOMEM); return 0; }
pagesallocated++;
return STACK[--stackused];
}
void Put(addr_t page)
{
ASSERT(stackused < MAXSTACKLENGTH);
pagesallocated--;
STACK[stackused++] = page;
}
}