POSIX locking vs. Windows locking

or coalesced

fcntl(F_SETLK, F_RDLCK, 2, 13)

R

W

W

W

R

R

R

R

R

R

R

1

2

3

4

5

6

7

8

9

10

11

12

13

14

0

R

R

W

W

R

R

R

R

R

R

R

1

2

3

4

5

6

7

8

9

10

11

12

13

14

0

R

R

R

R

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