| /contrib/sdk/sources/libsync/m_lock.asm |
|---|
| 0,0 → 1,41 |
| format MS COFF |
| use32 |
| MUTEX.lock equ 0 |
| MUTEX.handle equ 4 |
| section '.text' align 16 code readable executable |
| public @mutex_lock@4 |
| @mutex_lock@4: |
| mov eax, 1 |
| lock xadd [ecx+MUTEX.lock], eax |
| test eax, eax |
| jnz .slow |
| ret |
| .slow: |
| push ebx |
| push esi |
| push edi |
| mov edi, ecx |
| mov ecx, [edi+MUTEX.handle] |
| mov edx, 2 |
| mov ebx, edx |
| xor esi, esi |
| align 4 |
| .again: |
| mov eax, edx |
| xchg eax, [edi+MUTEX.lock] |
| test eax, eax |
| jz .ok |
| mov eax, 77 |
| int 0x40 |
| jmp .again |
| .ok: |
| pop edi |
| pop esi |
| pop ebx |
| ret |