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Rev 5596 Rev 5597
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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: 5596 $
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$Revision: 5597 $
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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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        list_init ecx
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        list_init ecx
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        mov     [eax+FUTEX.flags], 0
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        mov     [eax+FUTEX.flags], 0
28 
.fail:
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.fail:
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        ret
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        ret
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- 
 
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align 4
- 
 
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;int __fastcall destroy_futex(struct futex *futex)
- 
 
 33 
destroy_futex:
- 
 
 34 
        push    esi
- 
 
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        mov     esi, [current_process]
- 
 
 36 
        mov     edx, [ecx+FUTEX.handle]
- 
 
 37 
 
- 
 
 38 
        pushfd
- 
 
 39 
        cli
- 
 
 40 
 
- 
 
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        lea     eax, [ecx+FUTEX.wait_list]
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        cmp     eax, [eax+LHEAD.next]
- 
 
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        jne     .fail
- 
 
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- 
 
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        mov     eax, [esi+PROC.ht_next]
- 
 
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        mov     [esi+PROC.htab+edx*4], eax
- 
 
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        mov     [esi+PROC.ht_next], edx
- 
 
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        inc     [esi+PROC.ht_free]
- 
 
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- 
 
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        popfd
- 
 
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        pop     esi
- 
 
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- 
 
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        mov     eax, ecx
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        call    free
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        xor     eax, eax
- 
 
 56 
        ret
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- 
 
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.fail:
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        popfd
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        pop     esi
- 
 
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        mov     eax, -1
- 
 
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        ret
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iglobal
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iglobal
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align 4
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align 4
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f77call:
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f77call:
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        dd f77.futex_init     ;0
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        dd f77.futex_init     ;0
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        dd f77.futex_destroy  ;1
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        dd f77.futex_wait     ;1
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        dd f77.futex_wait     ;2
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        dd f77.futex_wake     ;2
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        dd f77.futex_wake     ;3
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.end:
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.end:
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endg
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endg
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align 4
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align 4
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sys_synchronization:
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f77:
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        test    ebx, ebx
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sys_synchronization:
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        jz      .futex_init
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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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        cmp     ecx, STDERR_FILENO
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        jbe     .fail
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        cmp     ecx, (PROC.pdt_0 - PROC.htab)/4
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        jae     .fail
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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     .fail
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        cmp     ebx, (f77call.end-f77call)/4
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        cmp     [edi+FUTEX.handle], ecx
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        jae .fail
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        jne     .fail
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        jmp     dword [f77call+ebx*4]
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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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.fail:
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        ret
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        mov     [esp+SYSCALL_STACK._eax], -1
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        ret
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 102 
 
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align 4
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align 4
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.futex_init:
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.futex_init:
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        call    create_futex
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        call    create_futex
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        test    eax, eax
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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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- 
 
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align 4
- 
 
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;ecx futex handle
- 
 
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;esi current process
- 
 
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;edi futex object
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        jz      @F
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.futex_destroy:
58 
        mov     eax, [eax+FUTEX.handle]
 119 
        mov     ecx, edi
- 
 
 120 
        call    destroy_futex
- 
 
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        mov     [esp+SYSCALL_STACK._eax], eax
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@@:
 122 
        ret
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        mov     [esp+SYSCALL_STACK._eax], eax
 123 
 
61 
        ret
 - 
 
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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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.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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 - 
 
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        mov     esi, [current_process]
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        mov     edi, [esi+PROC.htab+ecx*4]
 - 
 
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 124 
align 4
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        cmp     [edi+FUTEX.magic], 'FUTX'
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        jne     .epicfail
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;ecx futex handle
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        cmp     [edi+FUTEX.handle], ecx
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;esi current process
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        jne     .epicfail
 127 
;edi futex object
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;edx control value
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109 
 
 158 
 
110 
        popfd
 159 
        popfd
111 
        mov     [esp+SYSCALL_STACK._eax], 0
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        mov     [esp+SYSCALL_STACK._eax], 0
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112 
        ret
 - 
 
113 
 
 - 
 
114 
.epicfail:
 - 
 
115 
        mov     [esp+SYSCALL_STACK._eax], -1
 - 
 
116 
        ret
 161 
        ret
117 
 
 162 
 
- 
 
 163 
align 4
- 
 
 164 
;ecx futex handle
118 
align 4
 165 
;esi current process
119 
;ecx futex handle
 166 
;edi futex object
120 
;edx threads count
 - 
 
121 
.futex_wake:
 - 
 
122 
        cmp     ecx, 3
 - 
 
123 
        jb      .epicfail
 - 
 
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        cmp     ecx, (PROC.pdt_0 - PROC.htab)/4
 - 
 
125 
        jae     .epicfail
 - 
 
126 
 
 - 
 
127 
        mov     esi, [current_process]
 - 
 
128 
        mov     edi, [esi+PROC.htab+ecx*4]
 - 
 
129 
 
 - 
 
130 
        cmp     [edi+FUTEX.magic], 'FUTX'
 - 
 
131 
        jne     .epicfail
 - 
 
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132 
        cmp     [edi+FUTEX.handle], ecx
 167 
;edx threads count
Line 133... Line 168...
133 
        jne     .epicfail
 168 
.futex_wake:
134 
 
 169 
 
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135 
        xor     ecx, ecx
 170 
        xor     ecx, ecx
136 
 
 171 
 
137 
        pushfd
 172 
        pushfd
138 
        cli
 173 
        cli
139 
 
 174 
 
Line 140... Line 175...
140 
        lea     ebx, [edi+FUTEX.wait_list]
 175 
        lea     ebx, [edi+FUTEX.wait_list]