// -*- mode: cpp; mode: fold -*-
// Description /*{{{*/
-// $Id: acquire.cc,v 1.20 1998/12/05 04:19:03 jgg Exp $
+// $Id: acquire.cc,v 1.38 1999/07/30 05:36:52 jgg Exp $
/* ######################################################################
Acquire - File Acquiration
#include <apt-pkg/acquire-worker.h>
#include <apt-pkg/configuration.h>
#include <apt-pkg/error.h>
-#include <strutl.h>
+#include <apt-pkg/strutl.h>
#include <dirent.h>
#include <sys/time.h>
+#include <errno.h>
/*}}}*/
// Acquire::pkgAcquire - Constructor /*{{{*/
/* Free our memory, clean up the queues (destroy the workers) */
pkgAcquire::~pkgAcquire()
{
- while (Items.size() != 0)
- delete Items[0];
-
while (Configs != 0)
{
MethodConfig *Jnk = Configs;
Configs = Configs->Next;
delete Jnk;
}
+
+ Shutdown();
+}
+ /*}}}*/
+// pkgAcquire::Shutdown - Clean out the acquire object /*{{{*/
+// ---------------------------------------------------------------------
+/* */
+void pkgAcquire::Shutdown()
+{
+ while (Items.size() != 0)
+ delete Items[0];
while (Queues != 0)
{
// Acquire::Enqueue - Queue an URI for fetching /*{{{*/
// ---------------------------------------------------------------------
/* This is the entry point for an item. An item calls this function when
- it is construction which creates a queue (based on the current queue
+ it is constructed which creates a queue (based on the current queue
mode) and puts the item in that queue. If the system is running then
the queue might be started. */
void pkgAcquire::Enqueue(ItemDesc &Item)
/* This runs the queues. It manages a select loop for all of the
Worker tasks. The workers interact with the queues and items to
manage the actual fetch. */
-bool pkgAcquire::Run()
+pkgAcquire::RunResult pkgAcquire::Run()
{
Running = true;
if (Log != 0)
Log->Start();
+ bool WasCancelled = false;
+
// Run till all things have been acquired
struct timeval tv;
tv.tv_sec = 0;
FD_ZERO(&WFds);
SetFds(Highest,&RFds,&WFds);
- int Res = select(Highest+1,&RFds,&WFds,0,&tv);
+ int Res;
+ do
+ {
+ Res = select(Highest+1,&RFds,&WFds,0,&tv);
+ }
+ while (Res < 0 && errno == EINTR);
+
if (Res < 0)
{
_error->Errno("select","Select has failed");
tv.tv_usec = 500000;
for (Worker *I = Workers; I != 0; I = I->NextAcquire)
I->Pulse();
- if (Log != 0)
- Log->Pulse(this);
+ if (Log != 0 && Log->Pulse(this) == false)
+ {
+ WasCancelled = true;
+ break;
+ }
}
}
for (Queue *I = Queues; I != 0; I = I->Next)
I->Shutdown();
- return !_error->PendingError();
+ // Shut down the items
+ for (Item **I = Items.begin(); I != Items.end(); I++)
+ (*I)->Finished();
+
+ if (_error->PendingError())
+ return Failed;
+ if (WasCancelled)
+ return Cancelled;
+ return Continue;
}
/*}}}*/
// Acquire::Bump - Called when an item is dequeued /*{{{*/
return Total;
}
/*}}}*/
+// Acquire::PartialPresent - Number of partial bytes we already have /*{{{*/
+// ---------------------------------------------------------------------
+/* This is the number of bytes that is not local */
+unsigned long pkgAcquire::PartialPresent()
+{
+ unsigned long Total = 0;
+ for (pkgAcquire::Item **I = ItemsBegin(); I != ItemsEnd(); I++)
+ if ((*I)->Local == false)
+ Total += (*I)->PartialSize;
+ return Total;
+}
+ /*}}}*/
+// pkgAcquire::UriBegin - Start iterator for the uri list /*{{{*/
+// ---------------------------------------------------------------------
+/* */
+pkgAcquire::UriIterator pkgAcquire::UriBegin()
+{
+ return UriIterator(Queues);
+}
+ /*}}}*/
+// pkgAcquire::UriEnd - End iterator for the uri list /*{{{*/
+// ---------------------------------------------------------------------
+/* */
+pkgAcquire::UriIterator pkgAcquire::UriEnd()
+{
+ return UriIterator(0);
+}
+ /*}}}*/
// Acquire::MethodConfig::MethodConfig - Constructor /*{{{*/
// ---------------------------------------------------------------------
Items = 0;
Next = 0;
Workers = 0;
+ MaxPipeDepth = 1;
+ PipeDepth = 0;
}
/*}}}*/
// Queue::~Queue - Destructor /*{{{*/
/*}}}*/
// Queue::Dequeue - Remove an item from the queue /*{{{*/
// ---------------------------------------------------------------------
-/* We return true if we hit something*/
+/* We return true if we hit something */
bool pkgAcquire::Queue::Dequeue(Item *Owner)
{
+ if (Owner->Status == pkgAcquire::Item::StatFetching)
+ return _error->Error("Tried to dequeue a fetching object");
+
bool Res = false;
QItem **I = &Items;
added other source retry to have cycle maintain a pipeline depth
on its own. */
if (Cnf->Pipeline == true)
- {
- bool Res = true;
- for (int I = 0; I != 10 && Res == true; I++)
- Res &= Cycle();
- return Res;
- }
+ MaxPipeDepth = 10;
+ else
+ MaxPipeDepth = 1;
return Cycle();
}
return true;
}
/*}}}*/
-// Queue::Finditem - Find a URI in the item list /*{{{*/
+// Queue::FindItem - Find a URI in the item list /*{{{*/
// ---------------------------------------------------------------------
/* */
pkgAcquire::Queue::QItem *pkgAcquire::Queue::FindItem(string URI,pkgAcquire::Worker *Owner)
main queue too.*/
bool pkgAcquire::Queue::ItemDone(QItem *Itm)
{
+ PipeDepth--;
+ if (Itm->Owner->Status == pkgAcquire::Item::StatFetching)
+ Itm->Owner->Status = pkgAcquire::Item::StatDone;
+
if (Itm->Owner->QueueCounter <= 1)
Owner->Dequeue(Itm->Owner);
else
/*}}}*/
// Queue::Cycle - Queue new items into the method /*{{{*/
// ---------------------------------------------------------------------
-/* This locates a new idle item and sends it to the worker */
+/* This locates a new idle item and sends it to the worker. If pipelining
+ is enabled then it keeps the pipe full. */
bool pkgAcquire::Queue::Cycle()
{
if (Items == 0 || Workers == 0)
return true;
+ if (PipeDepth < 0)
+ return _error->Error("Pipedepth failure");
+
// Look for a queable item
QItem *I = Items;
- for (; I != 0; I = I->Next)
- if (I->Owner->Status == pkgAcquire::Item::StatIdle)
- break;
-
- // Nothing to do, queue is idle.
- if (I == 0)
- return true;
+ while (PipeDepth < (signed)MaxPipeDepth)
+ {
+ for (; I != 0; I = I->Next)
+ if (I->Owner->Status == pkgAcquire::Item::StatIdle)
+ break;
+
+ // Nothing to do, queue is idle.
+ if (I == 0)
+ return true;
+
+ I->Worker = Workers;
+ I->Owner->Status = pkgAcquire::Item::StatFetching;
+ PipeDepth++;
+ if (Workers->QueueItem(I) == false)
+ return false;
+ }
- I->Worker = Workers;
- I->Owner->Status = pkgAcquire::Item::StatFetching;
- return Workers->QueueItem(I);
+ return true;
}
/*}}}*/
// Queue::Bump - Fetch any pending objects if we are idle /*{{{*/
// ---------------------------------------------------------------------
-/* */
+/* This is called when an item in multiple queues is dequeued */
void pkgAcquire::Queue::Bump()
{
+ Cycle();
}
/*}}}*/
/* This computes some internal state variables for the derived classes to
use. It generates the current downloaded bytes and total bytes to download
as well as the current CPS estimate. */
-void pkgAcquireStatus::Pulse(pkgAcquire *Owner)
+bool pkgAcquireStatus::Pulse(pkgAcquire *Owner)
{
TotalBytes = 0;
CurrentBytes = 0;
}
// Compute the current completion
+ unsigned long ResumeSize = 0;
for (pkgAcquire::Worker *I = Owner->WorkersBegin(); I != 0;
I = Owner->WorkerStep(I))
if (I->CurrentItem != 0 && I->CurrentItem->Owner->Complete == false)
+ {
CurrentBytes += I->CurrentSize;
-
+ ResumeSize += I->ResumePoint;
+
+ // Files with unknown size always have 100% completion
+ if (I->CurrentItem->Owner->FileSize == 0 &&
+ I->CurrentItem->Owner->Complete == false)
+ TotalBytes += I->CurrentSize;
+ }
+
// Normalize the figures and account for unknown size downloads
if (TotalBytes <= 0)
TotalBytes = 1;
if (Unknown == Count)
TotalBytes = Unknown;
- else
- TotalBytes += TotalBytes/(Count - Unknown)*Unknown;
+
+ // Wha?! Is not supposed to happen.
+ if (CurrentBytes > TotalBytes)
+ CurrentBytes = TotalBytes;
// Compute the CPS
struct timeval NewTime;
if (NewTime.tv_sec - Time.tv_sec == 6 && NewTime.tv_usec > Time.tv_usec ||
NewTime.tv_sec - Time.tv_sec > 6)
{
- // Compute the delta time with full accuracy
- long usdiff = NewTime.tv_usec - Time.tv_usec;
- long sdiff = NewTime.tv_sec - Time.tv_sec;
+ double Delta = NewTime.tv_sec - Time.tv_sec +
+ (NewTime.tv_usec - Time.tv_usec)/1000000.0;
- // Borrow
- if (usdiff < 0)
- {
- usdiff += 1000000;
- sdiff--;
- }
-
// Compute the CPS value
- if (sdiff == 0 && usdiff == 0)
+ if (Delta < 0.01)
CurrentCPS = 0;
else
- CurrentCPS = (CurrentBytes - LastBytes)/(sdiff + usdiff/1000000.0);
- LastBytes = CurrentBytes;
- ElapsedTime = NewTime.tv_sec - StartTime.tv_sec;
+ CurrentCPS = ((CurrentBytes - ResumeSize) - LastBytes)/Delta;
+ LastBytes = CurrentBytes - ResumeSize;
+ ElapsedTime = (unsigned long)Delta;
Time = NewTime;
}
+
+ return true;
}
/*}}}*/
// AcquireStatus::Start - Called when the download is started /*{{{*/
projects / apt.git / blobdiff