External/libvirt
1
0
Fork 0
mirror of https://gitlab.com/libvirt/libvirt.git synced 2024-12-24 14:45:24 +00:00
Code Issues Packages Projects Releases Wiki Activity

Explicitly track whether the buck is held in remote client

Browse Source 
Instead of inferring whether the buck is held from the waitDispatch
pointer, use an explicit 'bool haveTheBuck' field

* src/rpc/virnetclient.c: Explicitly track the buck
This commit is contained in:
Daniel P. Berrange 2011-11-11 15:28:41 +00:00
parent 2501d27e18
commit fa9595003d
1 changed files with 11 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

18
src/rpc/virnetclient.c
View File

@ -88,6 +88,8 @@ struct _virNetClient {
/* List of threads currently waiting for dispatch */
virNetClientCallPtr waitDispatch;
/* True if a thread holds the buck */
bool haveTheBuck;
size_t nstreams;
virNetClientStreamPtr *streams;
@ -1218,11 +1220,12 @@ static int virNetClientIO(virNetClientPtr client,
thiscall->msg->bufferLength,
client->waitDispatch);
/* Stick ourselves on the end of the wait queue */
virNetClientCallQueue(&client->waitDispatch, thiscall);
/* Check to see if another thread is dispatching */
if (client->waitDispatch) {
if (client->haveTheBuck) {
char ignore = 1;
/* Stick ourselves on the end of the wait queue */
virNetClientCallQueue(&client->waitDispatch, thiscall);
/* Force other thread to wakeup from poll */
if (safewrite(client->wakeupSendFD, &ignore, sizeof(ignore)) != sizeof(ignore)) {
@ -1259,12 +1262,11 @@ static int virNetClientIO(virNetClientPtr client,
}
/* Grr, someone passed the buck onto us ... */
} else {
/* We're the first to arrive */
virNetClientCallQueue(&client->waitDispatch, thiscall);
}
VIR_DEBUG("We have the buck %p %p", client->waitDispatch, thiscall);
client->haveTheBuck = true;
/*
* The buck stops here!
*
@ -1290,6 +1292,8 @@ static int virNetClientIO(virNetClientPtr client,
virGetLastError())
rv = -1;
client->haveTheBuck = false;
cleanup:
VIR_DEBUG("All done with our call %p %p %d", client->waitDispatch, thiscall, rv);
return rv;
@ -1308,7 +1312,7 @@ void virNetClientIncomingEvent(virNetSocketPtr sock,
goto done;
/* This should be impossible, but it doesn't hurt to check */
if (client->waitDispatch)
if (client->haveTheBuck)
goto done;
VIR_DEBUG("Event fired %p %d", sock, events);