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added function 18/16 - get size of free memory (in Kb) and function 18/17 - get size of all memory (in Kb).

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git-svn-id: svn://kolibrios.org@32 a494cfbc-eb01-0410-851d-a64ba20cac60
This commit is contained in:
Andrey Halyavin (halyavin) 2006-01-03 11:15:05 +00:00
parent 065b8d32b2
commit 435676e6a4
2 changed files with 33 additions and 119 deletions
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139
kernel/trunk/core/memmanag.inc
View File

@ -2,11 +2,6 @@ if ~defined memmanager_inc
memmanager_inc_fix:
memmanager_inc fix memmanager_inc_fix
;for testing in applications
if defined B32
iskernel=1
else
iskernel=0
end if
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; Memory allocator for MenuetOS kernel
;; Andrey Halyavin, halyavin@land.ru 2005
@ -27,21 +22,14 @@ max_heaps equ 8
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; memory manager data
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
MEM_heap_block_ rd .heap_block_info*max_heaps/4
MEM_heap_block=MEM_heap_block_+second_base_address
MEM_heap_count_ rd 1
MEM_heap_count=MEM_heap_count_+second_base_address
if iskernel = 0
MEM_general_mutex rd 1
MEM_call_count rd 1
MEM_mutex_pid rd 1
MEM_mutex_count rd 1
else
MEM_cli_count_ rd 1
MEM_cli_count=MEM_cli_count_+second_base_address
MEM_cli_prev_ rd 1
MEM_cli_prev=MEM_cli_prev_+second_base_address
end if
uglobal
MEM_heap_block rd .heap_block_info*max_heaps/4
MEM_heap_count rd 1
MEM_cli_count rd 1
MEM_cli_prev rd 1
MEM_FreeSpace rd 1
MEM_AllSpace rd 1
endg
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;MEM_Init
;;Initialize memory manager structures.
@ -50,93 +38,18 @@ end if
MEM_Init:
push eax
xor eax,eax
if iskernel = 0
mov [MEM_heap_count],eax
mov [MEM_general_mutex],eax
mov [MEM_call_count],eax
mov [MEM_mutex_pid],eax
mov [MEM_mutex_count],eax
else
mov [MEM_cli_prev],eax ;init value = 0
dec eax
mov [MEM_cli_count],eax ;init value = -1
end if
pop eax
ret
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;change_task
;;procedure for changing tasks.
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
if iskernel = 0
change_task:
push eax
push ebx
mov eax,5
xor ebx,ebx
inc ebx
int 0x40
pop ebx
pop eax
ret
end if
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;MEM_get_pid
;;determine current pid
;;result:
;; eax - pid
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
if iskernel = 0
MEM_get_pid:
push ebx
push ecx
sub esp,1024
mov eax,9
mov ebx,esp
mov ecx,-1
int 0x40
mov eax,[esp+30]
add esp,1024
pop ecx
pop ebx
ret
else
; pid_address dd 0x3000
;MEM_get_pid:
; mov eax,[pid_address]
; mov eax,[eax]
; ret
end if
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;MEM_Heap_Lock
;;Wait until all operations with heap will be finished.
;;Between MEM_Heap_Lock and MEM_Heap_UnLock operations
;;with heap are forbidden.
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
MEM_Heap_Lock:
if iskernel = 0
push eax
inc dword [MEM_call_count]
MEM_Heap_Lock_wait:
mov eax,1
xchg [MEM_general_mutex],eax
test eax,eax
jz MEM_Heap_Lock_end
call MEM_get_pid
cmp [MEM_mutex_pid],eax
jz MEM_Heap_Lock_end1
call change_task
jmp MEM_Heap_Lock_wait
MEM_Heap_Lock_end1:
inc dword [MEM_mutex_count]
pop eax
ret
MEM_Heap_Lock_end:
call MEM_get_pid
mov [MEM_mutex_pid],eax
mov dword [MEM_mutex_count],1
pop eax
ret
else
pushfd
cli
inc dword [MEM_cli_count]
@ -148,33 +61,11 @@ MEM_Heap_First_Lock: ;save interrupt flag
and dword [esp],1
pop dword [MEM_cli_prev]
ret
end if
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;MEM_Heap_UnLock
;;After this routine operations with heap are allowed.
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
MEM_Heap_UnLock:
if iskernel = 0
push eax
xor eax,eax
dec dword [MEM_mutex_count]
jnz MEM_Heap_UnLock_No_Wait1
dec dword [MEM_call_count]
mov [MEM_mutex_pid],eax
mov [MEM_general_mutex],eax;release mutex BEFORE task switching
jz MEM_Heap_UnLock_No_Wait
call change_task ;someone want to use heap - switch tasks
MEM_Heap_UnLock_No_Wait:
pop eax
ret
MEM_Heap_UnLock_No_Wait1:
dec dword [MEM_call_count]
jz MEM_Heap_UnLock_No_Wait2
call change_task
MEM_Heap_UnLock_No_Wait2:
pop eax
ret
else
dec dword [MEM_cli_count]
js MEM_Heap_UnLock_last
ret
@ -184,7 +75,6 @@ MEM_Heap_UnLock_last:
sti
MEM_Heap_UnLock_No_sti:
ret
end if
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;MEM_Add_Heap
;;Add new range to memory manager.
@ -209,10 +99,17 @@ MEM_Add_Heap:
mov [MEM_heap_block+edx+.heap_physical_address],ecx
lea edx,[4*ebx+.range_info+4095] ;calculate space for page info table
and edx,0xFFFFF000
push edi
mov edi,edx
shr edi,12
sub edi,ebx ;edi=-free space
sub [MEM_FreeSpace],edi
sub [MEM_AllSpace],edi
mov [eax],eax
add [eax],edx ;first 4 bytes - pointer to first free page
;clean page info area
push edi
lea edi,[eax+4]
mov ecx,edx
shr ecx,2
@ -332,6 +229,7 @@ MEM_Alloc_Page_loop:
pop eax
pop ecx
add eax,[MEM_heap_block+ecx+.heap_physical_address]
dec [MEM_FreeSpace]
jmp MEM_Alloc_Page_ret
MEM_Alloc_Page_loopend:
pop ecx
@ -371,6 +269,7 @@ MEM_Alloc_Page_Linear_loop:
mov word [ecx+.range_info+eax],1
pop eax
pop ecx
dec [MEM_FreeSpace]
jmp MEM_Alloc_Page_Linear_ret
MEM_Alloc_Page_Linear_loopend:
pop ecx
@ -434,6 +333,7 @@ MEM_Free_Page_Bucket:
mov [ecx],eax
pop dword [eax]
mov dword [ecx+.range_info+ebx],0
inc [MEM_FreeSpace]
MEM_Free_Page_OK:
mov eax,1
MEM_Free_Page_ret:
@ -511,6 +411,7 @@ MEM_Free_Page_Linear_Bucket:
mov [edx+4],eax
MEM_Free_Page_No_Next:
mov dword [ecx+.range_info+ebx],0
inc [MEM_FreeSpace]
MEM_Free_Page_Linear_OK:
xor eax, eax
inc eax

13
kernel/trunk/kernel.asm
View File

@ -2245,6 +2245,19 @@ nosys_wait_retrace:
ret
no_mouse_centered:
;* end code - get active process (2) - Mario79
cmp eax,16
jnz no_get_free_space
mov eax,[MEM_FreeSpace]
shl eax,2
ret
no_get_free_space:
cmp eax,17
jnz no_get_all_space
mov eax,[MEM_AllSpace]
shl eax,2
ret
no_get_all_space:
ret
window_minimize db 0
sound_flag db 0