forked from KolibriOS/kolibrios
500 lines
11 KiB
PHP
500 lines
11 KiB
PHP
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;; ;;
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;; Copyright (C) KolibriOS team 2004-2015. All rights reserved. ;;
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;; Distributed under terms of the GNU General Public License ;;
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;; ;;
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;; Synhronization for MenuetOS. ;;
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;; Author: Halyavin Andrey, halyavin@land.ru ;;
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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$Revision$
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align 4
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;struct futex* __fastcall create_futex(int *ptr)
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create_futex:
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push ecx
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mov ecx, sizeof.FUTEX
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call create_object
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pop ecx
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test eax, eax
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jz .fail
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mov [eax+FUTEX.magic], 'FUTX'
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mov [eax+FUTEX.destroy], 0
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mov [eax+FUTEX.pointer], ecx
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lea ecx, [eax+FUTEX.wait_list]
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list_init ecx
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mov [eax+FUTEX.flags], 0
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.fail:
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ret
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iglobal
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align 4
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f77call:
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dd f77.futex_init ;0
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dd f77.futex_wait ;1
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dd f77.futex_wake ;2
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.end:
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endg
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align 4
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sys_synchronization:
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f77:
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cmp ebx, (f77call.end-f77call)/4
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jae .fail
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jmp dword [f77call+ebx*4]
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.fail:
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mov [esp+SYSCALL_STACK._eax], -1
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ret
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align 4
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.futex_init:
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call create_futex
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test eax, eax
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jz @F
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mov eax, [eax+FUTEX.handle]
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@@:
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mov [esp+SYSCALL_STACK._eax], eax
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ret
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align 4
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;ecx futex handle
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;edx control value
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.futex_wait:
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cmp ecx, 3
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jb .epicfail
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cmp ecx, (PROC.pdt_0 - PROC.htab)/4
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jae .epicfail
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mov esi, [current_process]
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mov edi, [esi+PROC.htab+ecx*4]
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cmp [edi+FUTEX.magic], 'FUTX'
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jne .epicfail
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cmp [edi+FUTEX.handle], ecx
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jne .epicfail
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mov ecx, [edi+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
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mov [esp+SYSCALL_STACK._eax], 0
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ret
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.wait_slow:
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pushfd
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cli
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sub esp, sizeof.MUTEX_WAITER
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mov ebx, [TASK_BASE]
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mov [ebx+TASKDATA.state], 1
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mov [esp+MUTEX_WAITER.task], ebx
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lea esi, [edi+FUTEX.wait_list]
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list_add_tail esp, esi ;esp= new waiter, esi= list head
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.again:
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call change_task
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lock cmpxchg [ecx], edx
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jz .again
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list_del esp
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add esp, sizeof.MUTEX_WAITER
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popfd
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mov [esp+SYSCALL_STACK._eax], 0
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ret
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.epicfail:
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mov [esp+SYSCALL_STACK._eax], -1
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ret
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align 4
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;ecx futex handle
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;edx threads count
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.futex_wake:
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cmp ecx, 3
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jb .epicfail
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cmp ecx, (PROC.pdt_0 - PROC.htab)/4
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jae .epicfail
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mov esi, [current_process]
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mov edi, [esi+PROC.htab+ecx*4]
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cmp [edi+FUTEX.magic], 'FUTX'
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jne .epicfail
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cmp [edi+FUTEX.handle], ecx
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jne .epicfail
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xor ecx, ecx
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pushfd
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cli
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lea ebx, [edi+FUTEX.wait_list]
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mov esi, [edi+FUTEX.wait_list.next]
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@@:
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cmp esi, ebx
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je @F
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mov eax, [esi+MUTEX_WAITER.task]
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mov [eax+TASKDATA.state], 0
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mov esi, [esi+MUTEX_WAITER.list.next]
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inc ecx
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cmp ecx, edx
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jb @B
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@@:
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popfd
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mov [esp+SYSCALL_STACK._eax], ecx
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ret
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RWSEM_WAITING_FOR_WRITE equ 0
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RWSEM_WAITING_FOR_READ equ 1
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;void __fastcall mutex_init(struct mutex *lock)
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align 4
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mutex_init:
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mov [ecx+MUTEX.wait_list.next], ecx
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mov [ecx+MUTEX.wait_list.prev], ecx
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mov [ecx+MUTEX.count], 1
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ret
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;void __fastcall mutex_lock(struct mutex *lock)
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align 4
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mutex_lock:
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dec [ecx+MUTEX.count]
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jns .done
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pushfd
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cli
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sub esp, sizeof.MUTEX_WAITER
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list_add_tail esp, ecx ;esp= new waiter, ecx= list head
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mov edx, [TASK_BASE]
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mov [esp+MUTEX_WAITER.task], edx
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.forever:
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mov eax, -1
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xchg eax, [ecx+MUTEX.count]
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dec eax
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jz @F
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mov [edx+TASKDATA.state], 1
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call change_task
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jmp .forever
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@@:
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mov eax, ecx
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list_del esp
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cmp [eax+MUTEX.wait_list.next], eax
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jne @F
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mov [eax+MUTEX.count], 0
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@@:
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add esp, sizeof.MUTEX_WAITER
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popfd
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.done:
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ret
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;void __fastcall mutex_unlock(struct mutex *lock)
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align 4
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mutex_unlock:
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pushfd
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cli
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mov eax, [ecx+MUTEX.wait_list.next]
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cmp eax, ecx
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mov [ecx+MUTEX.count], 1
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je @F
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mov eax, [eax+MUTEX_WAITER.task]
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mov [eax+TASKDATA.state], 0
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@@:
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popfd
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ret
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;void __fastcall init_rwsem(struct rw_semaphore *sem)
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align 4
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init_rwsem:
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mov [ecx+RWSEM.wait_list.next], ecx
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mov [ecx+RWSEM.wait_list.prev], ecx
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mov [ecx+RWSEM.count], 0
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ret
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;void __fastcall down_read(struct rw_semaphore *sem)
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align 4
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down_read:
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pushfd
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cli
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mov eax, [ecx+RWSEM.count]
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test eax, eax
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js @F
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cmp ecx, [ecx+RWSEM.wait_list.next]
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je .ok
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@@:
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sub esp, sizeof.MUTEX_WAITER
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mov eax, [TASK_BASE]
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mov [esp+MUTEX_WAITER.task], eax
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mov [esp+MUTEX_WAITER.type], RWSEM_WAITING_FOR_READ
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mov [eax+TASKDATA.state], 1
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list_add_tail esp, ecx ;esp= new waiter, ecx= list head
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call change_task
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add esp, sizeof.MUTEX_WAITER
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popfd
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ret
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.ok:
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inc eax
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mov [ecx+RWSEM.count], eax
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popfd
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ret
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;void __fastcall down_write(struct rw_semaphore *sem)
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align 4
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down_write:
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pushfd
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cli
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sub esp, sizeof.MUTEX_WAITER
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mov edx, [TASK_BASE]
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mov [esp+MUTEX_WAITER.task], edx
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mov [esp+MUTEX_WAITER.type], RWSEM_WAITING_FOR_WRITE
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mov [edx+TASKDATA.state], 1
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list_add_tail esp, ecx ;esp= new waiter, ecx= list head
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xor eax, eax
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not eax
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.forever:
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test eax, [ecx+RWSEM.count]
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jz @F
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mov [edx+TASKDATA.state], 1
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call change_task
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jmp .forever
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@@:
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mov [ecx+RWSEM.count], eax
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list_del esp
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add esp, sizeof.MUTEX_WAITER
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popfd
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ret
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;void __fastcall up_read(struct rw_semaphore *sem)
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align 4
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up_read:
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pushfd
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cli
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dec [ecx+RWSEM.count]
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jnz @F
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mov eax, [ecx+RWSEM.wait_list.next]
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cmp eax, ecx
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je @F
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mov eax, [eax+MUTEX_WAITER.task]
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mov [eax+TASKDATA.state], 0
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@@:
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popfd
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ret
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;void __fastcall up_write(struct rw_semaphore *sem)
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align 4
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up_write:
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pushfd
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cli
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mov eax, [ecx+RWSEM.wait_list.next]
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mov [ecx+RWSEM.count], 0
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cmp ecx, eax
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je .done
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mov edx, [eax+MUTEX_WAITER.type]
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test edx, edx
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jnz .wake
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mov eax, [eax+MUTEX_WAITER.task]
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mov [eax+TASKDATA.state], 0
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.done:
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popfd
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ret
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.wake:
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push ebx
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push esi
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push edi
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xor esi, esi
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mov edi, ecx
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.wake_list:
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mov ebx, [eax+MUTEX_WAITER.list.next]
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list_del eax
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mov edx, [eax+MUTEX_WAITER.task]
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mov [edx+TASKDATA.state], 0
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inc esi
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cmp edi, ebx
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je .wake_done
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mov ecx, [ebx+MUTEX_WAITER.type]
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test ecx, ecx
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jz .wake_done
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mov eax, ebx
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jmp .wake_list
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.wake_done:
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add [edi+RWSEM.count], esi
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pop edi
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pop esi
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pop ebx
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popfd
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ret
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purge RWSEM_WAITING_FOR_WRITE
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purge RWSEM_WAITING_FOR_READ
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if ~defined sync_inc
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sync_inc_fix:
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sync_inc fix sync_inc_fix
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;simplest mutex.
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macro SimpleMutex name
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{
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; iglobal
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name dd 0
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name#.type = 1
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; endg
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}
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macro WaitSimpleMutex name
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{
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local start_wait,ok
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start_wait=$
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cli
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cmp [name], dword 0
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jz ok
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sti
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call change_task
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jmp start_wait
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ok=$
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push eax
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mov eax, dword [TASK_BASE+second_base_address]
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mov eax, [eax+TASKDATA.pid]
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mov [name], eax
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pop eax
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sti
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}
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macro ReleaseSimpleMutex name
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{
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mov [name], dword 0
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}
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macro TryWaitSimpleMutex name ;result in eax and in flags
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{
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local ok,try_end
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cmp [name], dword 0
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jz ok
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xor eax, eax
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jmp try_end
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ok=$
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xor eax, eax
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inc eax
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try_end=$
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}
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macro SimpleCriticalSection name
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{
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; iglobal
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name dd 0
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dd 0
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name#.type=2
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; endg
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}
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macro WaitSimpleCriticalSection name
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{
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local start_wait,first_wait,inc_counter,end_wait
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push eax
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mov eax, [TASK_BASE+second_base_address]
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mov eax, [eax+TASKDATA.pid]
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start_wait=$
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cli
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cmp [name], dword 0
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jz first_wait
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cmp [name], eax
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jz inc_counter
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sti
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call change_task
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jmp start_wait
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first_wait=$
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mov [name], eax
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mov [name+4], dword 1
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jmp end_wait
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inc_counter=$
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inc dword [name+4]
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end_wait=$
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sti
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pop eax
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}
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macro ReleaseSimpleCriticalSection name
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{
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local release_end
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dec dword [name+4]
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jnz release_end
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mov [name], dword 0
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release_end=$
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}
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macro TryWaitSimpleCriticalSection name ;result in eax and in flags
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{
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local ok,try_end
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mov eax, [CURRENT_TASK+second_base_address]
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mov eax, [eax+TASKDATA.pid]
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cmp [name], eax
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jz ok
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cmp [name], 0
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jz ok
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xor eax, eax
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jmp try_end
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ok=$
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xor eax, eax
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inc eax
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try_end=$
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}
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_cli equ call MEM_HeapLock
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_sti equ call MEM_HeapUnLock
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end if
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