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rewritten new_mem_resize

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git-svn-id: svn://kolibrios.org@2594 a494cfbc-eb01-0410-851d-a64ba20cac60
This commit is contained in:
Sergey Semyonov (Serge) 2012-04-09 13:19:32 +00:00
parent d08512f2e7
commit fdbd14a1ca
1 changed files with 56 additions and 59 deletions
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115
kernel/trunk/core/memory.inc
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@ -442,72 +442,82 @@ endp
align 4
proc new_mem_resize stdcall, new_size:dword
mov ecx, pg_data.mutex
call mutex_lock
push ebx
push esi
push edi
mov edx, [current_slot]
cmp [edx+APPDATA.heap_base], 0
jne .exit
mov edi, [new_size]
add edi, 4095
and edi, not 4095
mov [new_size], edi
mov edx, [current_slot]
cmp [edx+APPDATA.heap_base], 0
jne .exit
mov esi, [edx+APPDATA.mem_size]
add esi, 4095
and esi, not 4095
cmp edi, esi
jae .expand
ja .expand
je .exit
mov ebx, edi
shr edi, 12
shr esi, 12
mov ecx, pg_data.mutex
call mutex_lock
@@:
mov eax, [app_page_tabs+edi*4]
test eax, 1
jz .next
mov dword [app_page_tabs+edi*4], 2
mov ebx, edi
shl ebx, 12
push eax
mov dword [app_page_tabs+edi*4], 0
invlpg [ebx]
pop eax
call free_page
.next:
add edi, 1
inc edi
cmp edi, esi
jb @B
.update_size:
mov ebx, [new_size]
call update_mem_size
mov ecx, pg_data.mutex
call mutex_unlock
.update_size:
mov edx, [current_slot]
mov ebx, [new_size]
call update_mem_size
.exit:
pop edi
pop esi
pop ebx
xor eax, eax
ret
.expand:
push esi
push edi
mov ecx, pg_data.mutex
call mutex_lock
xchg esi, edi
push esi ;new size
push edi ;old size
add edi, 0x3FFFFF
and edi, not(0x3FFFFF)
add esi, 0x3FFFFF
and esi, not(0x3FFFFF)
cmp esi, edi
cmp edi, esi
jae .grow
xchg esi, edi
@@:
@@:
call alloc_page
test eax, eax
jz .exit_pop
jz .exit_fail
stdcall map_page_table, edi, eax
@ -524,51 +534,38 @@ proc new_mem_resize stdcall, new_size:dword
cmp edi, esi
jb @B
.grow:
;//-
pop edi
push edi
mov esi, [pg_data.pages_free]
sub esi, 1
shr edi, 12
cmp esi, edi
jle .out_of_memory
;//-
pop edi
pop esi
@@:
call alloc_page
test eax, eax
jz .exit
stdcall map_page, esi, eax, dword PG_UW
pop edi ;old size
pop ecx ;new size
push edi
mov edi, esi
xor eax, eax
mov ecx, 1024
cld
shr edi, 10
shr ecx, 10
sub ecx, edi
shr ecx, 2 ;pages count
mov eax, 2
add edi, app_page_tabs
rep stosd
pop edi
add esi, 0x1000
cmp esi, edi
jb @B
jmp .update_size
;//-
.exit_pop:
.out_of_memory:
;//-
pop edi
pop esi
.exit:
mov ecx, pg_data.mutex
call mutex_unlock
jmp .update_size
.exit_fail:
mov ecx, pg_data.mutex
call mutex_unlock
add esp, 8
pop edi
pop esi
pop ebx
xor eax, eax
inc eax
ret
endp
align 4
update_mem_size:
; in: edx = slot base
; ebx = new memory size