1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
|
Program Example66;
{ Program to demonstrate the MMap function. }
Uses oldlinux;
Var S : String;
fd,Len : Longint;
args : tmmapargs;
P : PChar;
begin
S:='This is a string'#0;
Len:=Length(S);
fd:=fdOpen('testfile.txt',Open_wrOnly or open_creat);
If fd=-1 then
Halt(1);
If fdWrite(fd,S[1],Len)=-1 then
Halt(2);
fdClose(fd);
fdOpen('testfile.txt',Open_rdOnly);
if fd=-1 then
Halt(3);
args.address:=0;
args.offset:=0;
args.size:=Len+1;
args.fd:=Fd;
args.flags:=MAP_PRIVATE;
args.prot:=PROT_READ or PROT_WRITE;
P:=Pchar(mmap(args));
If longint(P)=-1 then
Halt(4);
Writeln('Read in memory :',P);
fdclose(fd);
if Not MUnMap(P,Len) Then
Halt(LinuxError);
end.
|
