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Fix gBS->Stall bug. The current code would only stall for a single timer tick. Fixing this issue exposed another issue with time slip in the stall that was also fixed.

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git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@11414 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
andrewfish
2011-03-22 20:30:35 +00:00
parent 667bf1e48f
commit b5b1aca92b
1 changed files with 22 additions and 3 deletions
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25
UnixPkg/Sec/UnixThunk.c
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@@ -142,17 +142,36 @@ void
msSleep (unsigned long Milliseconds) msSleep (unsigned long Milliseconds)
{ {
struct timespec rq, rm; struct timespec rq, rm;
struct timeval start, end;
unsigned long MicroSec;
rq.tv_sec = Milliseconds / 1000; rq.tv_sec = Milliseconds / 1000;
rq.tv_nsec = (Milliseconds % 1000) * 1000000; rq.tv_nsec = (Milliseconds % 1000) * 1000000;
while (nanosleep (&rq, &rm) != -1) { //
// nanosleep gets interrupted by our timer tic.
// we need to track wall clock time or we will stall for way too long
//
gettimeofday (&start, NULL);
end.tv_sec = start.tv_sec + rq.tv_sec;
MicroSec = (start.tv_usec + rq.tv_nsec/1000);
end.tv_usec = MicroSec % 1000000;
if (MicroSec > 1000000) {
end.tv_sec++;
}
while (nanosleep (&rq, &rm) == -1) {
if (errno != EINTR) { if (errno != EINTR) {
break; break;
} }
gettimeofday (&start, NULL);
if (start.tv_sec > end.tv_sec) {
break;
} if ((start.tv_sec == end.tv_sec) && (start.tv_usec > end.tv_usec)) {
break;
}
rq = rm; rq = rm;
} }
} }
void void