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1 #include "pthread_impl.h" | 1 #include "pthread_impl.h" |
2 | 2 |
3 static volatile int vmlock[2]; | 3 static volatile int vmlock[2]; |
4 | 4 |
5 void __vm_wait() | 5 void __vm_wait() { |
6 { | 6 int tmp; |
7 » int tmp; | 7 while ((tmp = vmlock[0])) |
8 » while ((tmp=vmlock[0])) | 8 __wait(vmlock, vmlock + 1, tmp, 1); |
9 » » __wait(vmlock, vmlock+1, tmp, 1); | |
10 } | 9 } |
11 | 10 |
12 void __vm_lock() | 11 void __vm_lock() { |
13 { | 12 a_inc(vmlock); |
14 » a_inc(vmlock); | |
15 } | 13 } |
16 | 14 |
17 void __vm_unlock() | 15 void __vm_unlock() { |
18 { | 16 if (a_fetch_add(vmlock, -1) == 1 && vmlock[1]) |
19 » if (a_fetch_add(vmlock, -1)==1 && vmlock[1]) | 17 __wake(vmlock, -1, 1); |
20 » » __wake(vmlock, -1, 1); | |
21 } | 18 } |
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