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HEAD
fix O_RDWR bug.
[mit-jos.git]
/
lib
/
wait.c
blob
018bc5982a0d39a20ef11d46a5afa962abfb5845
1
#include <inc/lib.h>
2
3
// Waits until 'envid' exits.
4
void
5
wait
(
envid_t envid
)
6
{
7
volatile
struct
Env
*
e
;
8
9
assert
(
envid
!=
0
);
10
e
= &
envs
[
ENVX
(
envid
)];
11
while
(
e
->
env_id
==
envid
&&
e
->
env_status
!=
ENV_FREE
)
12
sys_yield
();
13
}