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