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Rev 5597 Rev 5599
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;;                                                              ;;
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;;                                                              ;;
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;; Synhronization for MenuetOS.                                 ;;
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;; Synhronization for MenuetOS.                                 ;;
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;; Author: Halyavin Andrey, halyavin@land.ru                    ;;
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;; Author: Halyavin Andrey, halyavin@land.ru                    ;;
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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$Revision: 5597 $
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$Revision: 5599 $
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 11 
 
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align 4
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align 4
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;struct futex*  __fastcall create_futex(int *ptr)
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;struct futex*  __fastcall create_futex(int *ptr)
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        cmp     ecx, STDERR_FILENO
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        cmp     ecx, STDERR_FILENO
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        jbe     .fail
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        jbe     .fail
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        cmp     ecx, (PROC.pdt_0 - PROC.htab)/4
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        cmp     ecx, (PROC.pdt_0 - PROC.htab)/4
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        jae     .fail
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        jae     .fail
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 88 
 
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        mov     esi, [current_process]
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        mov     edi, [current_process]
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        mov     edi, [esi+PROC.htab+ecx*4]
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        mov     ebp, [edi+PROC.htab+ecx*4]
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        cmp     [edi+FUTEX.magic], 'FUTX'
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        cmp     [ebp+FUTEX.magic], 'FUTX'
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        jne     .fail
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        jne     .fail
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        cmp     [edi+FUTEX.handle], ecx
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        cmp     [ebp+FUTEX.handle], ecx
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        jne     .fail
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        jne     .fail
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        ret
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        ret
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align 4
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align 4
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;ecx futex handle
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;ecx futex handle
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;esi current process
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;edi current process
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;edi futex object
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;ebp futex object
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.futex_destroy:
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.futex_destroy:
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        mov     ecx, edi
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        mov     ecx, ebp
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        call    destroy_futex
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        call    destroy_futex
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        mov     [esp+SYSCALL_STACK._eax], eax
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        mov     [esp+SYSCALL_STACK._eax], eax
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        ret
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        ret
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 - 
 
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align 4
 - 
 
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;ecx futex handle
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- 
 
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align 4
- 
 
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;ecx futex handle
- 
 
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;edx control value
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;esi current process
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;esi timeout
- 
 
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;edi current process
- 
 
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;ebp futex object
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;edi futex object
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.futex_wait:
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;edx control value
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        test    esi, esi
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.futex_wait:
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        jnz     .futex_wait_timeout
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        mov     ecx, [edi+FUTEX.pointer]
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        mov     ecx, [ebp+FUTEX.pointer]
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        mov     eax, edx
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        mov     eax, edx
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        sub     esp, sizeof.MUTEX_WAITER
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        sub     esp, sizeof.MUTEX_WAITER
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        mov     ebx, [TASK_BASE]
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        mov     ebx, [TASK_BASE]
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        mov     [ebx+TASKDATA.state], 1
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        mov     [ebx+TASKDATA.state], 1
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        mov     [esp+MUTEX_WAITER.task], ebx
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        mov     [esp+MUTEX_WAITER.task], ebx
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        lea     esi, [edi+FUTEX.wait_list]
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        lea     esi, [ebp+FUTEX.wait_list]
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        list_add_tail esp, esi      ;esp= new waiter, esi= list head
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        list_add_tail esp, esi      ;esp= new waiter, esi= list head
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        mov     [esp+SYSCALL_STACK._eax], 0
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        mov     [esp+SYSCALL_STACK._eax], 0
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        ret
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        ret
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align 4
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align 4
- 
 
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;ecx futex handle
- 
 
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;edx control value
- 
 
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;esi timeout
- 
 
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;edi current process
- 
 
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;ebp futex object
- 
 
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- 
 
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.futex_wait_timeout:
- 
 
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        mov     ecx, [ebp+FUTEX.pointer]
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        mov     eax, edx
- 
 
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        lock cmpxchg [ecx], edx         ;wait until old_value == new_value
- 
 
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        jz .wait_slow_timeout
- 
 
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- 
 
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        mov     [esp+SYSCALL_STACK._eax], 0
- 
 
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        ret
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- 
 
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align 4
- 
 
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.wait_test:
- 
 
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        xor     eax, eax
- 
 
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        ret
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- 
 
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.wait_slow_timeout:
- 
 
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        pushfd
- 
 
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        cli
- 
 
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- 
 
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        sub     esp, sizeof.MUTEX_WAITER
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- 
 
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        mov     ebx, [current_slot]
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        mov     [ebx+APPDATA.wait_test], f77.wait_test
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        mov     [ebx+APPDATA.wait_timeout], esi
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        mov     [ebx+APPDATA.wait_param], ebp
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        mov     eax, [timer_ticks]
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        mov     [ebx+APPDATA.wait_begin], eax
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        mov     eax, [TASK_BASE]
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        mov     [eax+TASKDATA.state], 5
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- 
 
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        mov     [esp+MUTEX_WAITER.task], ebx
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        lea     esi, [ebp+FUTEX.wait_list]
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- 
 
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        list_add_tail esp, esi      ;esp= new waiter, esi= list head
- 
 
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- 
 
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.again_timeout:
- 
 
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        call    change_task
- 
 
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        mov     eax, [ebx+APPDATA.wait_param]
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        test    eax, eax
- 
 
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        jz      .timeout
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- 
 
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        lock cmpxchg [ecx], edx
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        jz .again_timeout
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@@:
- 
 
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        list_del esp
- 
 
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        add     esp, sizeof.MUTEX_WAITER
- 
 
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- 
 
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        popfd
- 
 
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        mov     [esp+SYSCALL_STACK._eax], 0
- 
 
 221 
        ret
- 
 
 222 
 
- 
 
 223 
.timeout:
- 
 
 224 
        list_del esp
- 
 
 225 
        add     esp, sizeof.MUTEX_WAITER
- 
 
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- 
 
 227 
        popfd
- 
 
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        mov     [esp+SYSCALL_STACK._eax], -1
- 
 
 229 
        ret
- 
 
 230 
 
- 
 
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- 
 
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align 4
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;ecx futex handle
 233 
;ecx futex handle
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;esi current process
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;esi current process
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;edi futex object
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;edi futex object
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;edx threads count
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;edx threads count