forked from KolibriOS/kolibrios
330 lines
6.8 KiB
Plaintext
330 lines
6.8 KiB
Plaintext
(*
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BSD 2-Clause License
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Copyright (c) 2018, 2020, Anton Krotov
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All rights reserved.
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*)
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MODULE API;
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IMPORT SYSTEM, K := KOSAPI;
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CONST
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MAX_SIZE = 16 * 400H;
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HEAP_SIZE = 1 * 100000H;
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_new = 1;
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_dispose = 2;
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SizeOfHeader = 36;
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TYPE
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CRITICAL_SECTION = ARRAY 2 OF INTEGER;
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VAR
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heap, endheap: INTEGER;
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pockets: ARRAY MAX_SIZE DIV 32 + 1 OF INTEGER;
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CriticalSection: CRITICAL_SECTION;
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import*, multi: BOOLEAN;
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eol*: ARRAY 3 OF CHAR;
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base*: INTEGER;
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PROCEDURE [stdcall] zeromem* (dwords: INTEGER; adr: INTEGER);
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BEGIN
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SYSTEM.CODE(
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0FCH, (* cld *)
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031H, 0C0H, (* xor eax, eax *)
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057H, (* push edi *)
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08BH, 07DH, 00CH, (* mov edi, dword [ebp + 12] *)
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08BH, 04DH, 008H, (* mov ecx, dword [ebp + 8] *)
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0F3H, 0ABH, (* rep stosd *)
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05FH (* pop edi *)
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)
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END zeromem;
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PROCEDURE mem_commit* (adr, size: INTEGER);
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VAR
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tmp: INTEGER;
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BEGIN
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FOR tmp := adr TO adr + size - 1 BY 4096 DO
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SYSTEM.PUT(tmp, 0)
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END
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END mem_commit;
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PROCEDURE switch_task;
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BEGIN
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K.sysfunc2(68, 1)
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END switch_task;
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PROCEDURE futex_create (ptr: INTEGER): INTEGER;
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RETURN K.sysfunc3(77, 0, ptr)
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END futex_create;
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PROCEDURE futex_wait (futex, value, timeout: INTEGER);
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BEGIN
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K.sysfunc5(77, 2, futex, value, timeout)
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END futex_wait;
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PROCEDURE futex_wake (futex, number: INTEGER);
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BEGIN
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K.sysfunc4(77, 3, futex, number)
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END futex_wake;
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PROCEDURE EnterCriticalSection* (VAR CriticalSection: CRITICAL_SECTION);
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BEGIN
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switch_task;
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futex_wait(CriticalSection[0], 1, 10000);
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CriticalSection[1] := 1
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END EnterCriticalSection;
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PROCEDURE LeaveCriticalSection* (VAR CriticalSection: CRITICAL_SECTION);
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BEGIN
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CriticalSection[1] := 0;
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futex_wake(CriticalSection[0], 1)
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END LeaveCriticalSection;
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PROCEDURE InitializeCriticalSection* (VAR CriticalSection: CRITICAL_SECTION);
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BEGIN
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CriticalSection[0] := futex_create(SYSTEM.ADR(CriticalSection[1]));
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CriticalSection[1] := 0
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END InitializeCriticalSection;
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PROCEDURE __NEW (size: INTEGER): INTEGER;
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VAR
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res, idx, temp: INTEGER;
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BEGIN
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IF size <= MAX_SIZE THEN
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idx := ASR(size, 5);
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res := pockets[idx];
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IF res # 0 THEN
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SYSTEM.GET(res, pockets[idx]);
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SYSTEM.PUT(res, size);
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INC(res, 4)
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ELSE
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temp := 0;
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IF heap + size >= endheap THEN
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IF K.sysfunc2(18, 16) > ASR(HEAP_SIZE, 10) THEN
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temp := K.sysfunc3(68, 12, HEAP_SIZE)
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ELSE
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temp := 0
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END;
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IF temp # 0 THEN
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mem_commit(temp, HEAP_SIZE);
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heap := temp;
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endheap := heap + HEAP_SIZE
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ELSE
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temp := -1
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END
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END;
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IF (heap # 0) & (temp # -1) THEN
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SYSTEM.PUT(heap, size);
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res := heap + 4;
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heap := heap + size
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ELSE
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res := 0
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END
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END
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ELSE
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IF K.sysfunc2(18, 16) > ASR(size, 10) THEN
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res := K.sysfunc3(68, 12, size);
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IF res # 0 THEN
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mem_commit(res, size);
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SYSTEM.PUT(res, size);
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INC(res, 4)
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END
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ELSE
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res := 0
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END
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END;
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IF (res # 0) & (size <= MAX_SIZE) THEN
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zeromem(ASR(size, 2) - 1, res)
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END
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RETURN res
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END __NEW;
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PROCEDURE __DISPOSE (ptr: INTEGER): INTEGER;
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VAR
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size, idx: INTEGER;
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BEGIN
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DEC(ptr, 4);
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SYSTEM.GET(ptr, size);
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IF size <= MAX_SIZE THEN
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idx := ASR(size, 5);
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SYSTEM.PUT(ptr, pockets[idx]);
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pockets[idx] := ptr
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ELSE
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size := K.sysfunc3(68, 13, ptr)
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END
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RETURN 0
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END __DISPOSE;
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PROCEDURE NEW_DISPOSE (func, arg: INTEGER): INTEGER;
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VAR
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res: INTEGER;
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BEGIN
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IF multi THEN
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EnterCriticalSection(CriticalSection)
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END;
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IF func = _new THEN
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res := __NEW(arg)
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ELSIF func = _dispose THEN
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res := __DISPOSE(arg)
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END;
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IF multi THEN
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LeaveCriticalSection(CriticalSection)
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END
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RETURN res
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END NEW_DISPOSE;
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PROCEDURE _NEW* (size: INTEGER): INTEGER;
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RETURN NEW_DISPOSE(_new, size)
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END _NEW;
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PROCEDURE _DISPOSE* (ptr: INTEGER): INTEGER;
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RETURN NEW_DISPOSE(_dispose, ptr)
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END _DISPOSE;
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PROCEDURE exit* (p1: INTEGER);
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BEGIN
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K.sysfunc1(-1)
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END exit;
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PROCEDURE exit_thread* (p1: INTEGER);
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BEGIN
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K.sysfunc1(-1)
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END exit_thread;
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PROCEDURE OutChar (c: CHAR);
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BEGIN
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K.sysfunc3(63, 1, ORD(c))
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END OutChar;
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PROCEDURE OutLn;
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BEGIN
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OutChar(0DX);
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OutChar(0AX)
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END OutLn;
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PROCEDURE OutStr (pchar: INTEGER);
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VAR
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c: CHAR;
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BEGIN
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IF pchar # 0 THEN
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REPEAT
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SYSTEM.GET(pchar, c);
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IF c # 0X THEN
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OutChar(c)
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END;
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INC(pchar)
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UNTIL c = 0X
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END
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END OutStr;
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PROCEDURE DebugMsg* (lpText, lpCaption: INTEGER);
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BEGIN
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IF lpCaption # 0 THEN
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OutLn;
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OutStr(lpCaption);
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OutChar(":");
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OutLn
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END;
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OutStr(lpText);
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IF lpCaption # 0 THEN
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OutLn
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END
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END DebugMsg;
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PROCEDURE OutString (s: ARRAY OF CHAR);
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VAR
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i: INTEGER;
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BEGIN
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i := 0;
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WHILE (i < LEN(s)) & (s[i] # 0X) DO
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OutChar(s[i]);
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INC(i)
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END
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END OutString;
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PROCEDURE imp_error;
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BEGIN
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OutString("import error: ");
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IF K.imp_error.error = 1 THEN
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OutString("can't load "); OutString(K.imp_error.lib)
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ELSIF K.imp_error.error = 2 THEN
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OutString("not found "); OutString(K.imp_error.proc); OutString(" in "); OutString(K.imp_error.lib)
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END;
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OutLn
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END imp_error;
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PROCEDURE init* (_import, code: INTEGER);
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BEGIN
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multi := FALSE;
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eol[0] := 0DX; eol[1] := 0AX; eol[2] := 0X;
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base := code - SizeOfHeader;
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K.sysfunc2(68, 11);
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InitializeCriticalSection(CriticalSection);
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K._init;
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import := (K.dll_Load(_import) = 0) & (K.imp_error.error = 0);
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IF ~import THEN
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imp_error
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END
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END init;
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PROCEDURE SetMultiThr* (value: BOOLEAN);
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BEGIN
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multi := value
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END SetMultiThr;
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PROCEDURE GetTickCount* (): INTEGER;
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RETURN K.sysfunc2(26, 9) * 10
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END GetTickCount;
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PROCEDURE dllentry* (hinstDLL, fdwReason, lpvReserved: INTEGER): INTEGER;
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RETURN 0
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END dllentry;
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PROCEDURE sofinit*;
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END sofinit;
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END API. |