// -*- mode: cpp; mode: fold -*-
// Description /*{{{*/
-// $Id: acquire.cc,v 1.5 1998/10/26 07:11:47 jgg Exp $
+// $Id: acquire.cc,v 1.11 1998/11/11 06:54:16 jgg Exp $
/* ######################################################################
Acquire - File Acquiration
#include <apt-pkg/configuration.h>
#include <apt-pkg/error.h>
#include <strutl.h>
+
+#include <sys/time.h>
/*}}}*/
// Acquire::pkgAcquire - Constructor /*{{{*/
// ---------------------------------------------------------------------
-/* */
-pkgAcquire::pkgAcquire()
+/* We grab some runtime state from the configuration space */
+pkgAcquire::pkgAcquire(pkgAcquireStatus *Log) : Log(Log)
{
Queues = 0;
Configs = 0;
/*}}}*/
// Acquire::~pkgAcquire - Destructor /*{{{*/
// ---------------------------------------------------------------------
-/* Free our memory */
+/* Free our memory, clean up the queues (destroy the workers) */
pkgAcquire::~pkgAcquire()
{
while (Items.size() != 0)
/*}}}*/
// Acquire::Add - Add a new item /*{{{*/
// ---------------------------------------------------------------------
-/* */
+/* This puts an item on the acquire list. This list is mainly for tracking
+ item status */
void pkgAcquire::Add(Item *Itm)
{
Items.push_back(Itm);
/*}}}*/
// Acquire::Remove - Remove a item /*{{{*/
// ---------------------------------------------------------------------
-/* */
+/* Remove an item from the acquire list. This is usually not used.. */
void pkgAcquire::Remove(Item *Itm)
{
for (vector<Item *>::iterator I = Items.begin(); I < Items.end(); I++)
{
if (*I == Itm)
Items.erase(I);
- }
+ }
}
/*}}}*/
// Acquire::Add - Add a worker /*{{{*/
// ---------------------------------------------------------------------
-/* */
+/* A list of workers is kept so that the select loop can direct their FD
+ usage. */
void pkgAcquire::Add(Worker *Work)
{
Work->NextAcquire = Workers;
/*}}}*/
// Acquire::Remove - Remove a worker /*{{{*/
// ---------------------------------------------------------------------
-/* */
+/* A worker has died. This can not be done while the select loop is running
+ as it would require that RunFds could handling a changing list state and
+ it cant.. */
void pkgAcquire::Remove(Worker *Work)
{
+ if (Running == true)
+ abort();
+
Worker **I = &Workers;
for (; *I != 0;)
{
/*}}}*/
// Acquire::Enqueue - Queue an URI for fetching /*{{{*/
// ---------------------------------------------------------------------
-/* */
-void pkgAcquire::Enqueue(Item *Itm,string URI,string Description)
+/* 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
+ mode) and puts the item in that queue. If the system is running then
+ the queue might be started. */
+void pkgAcquire::Enqueue(ItemDesc &Item)
{
// Determine which queue to put the item in
- string Name = QueueName(URI);
+ string Name = QueueName(Item.URI);
if (Name.empty() == true)
return;
I = new Queue(Name,this);
I->Next = Queues;
Queues = I;
+
+ if (Running == true)
+ I->Startup();
}
+
+ Item.Owner->Status = Item::StatIdle;
// Queue it into the named queue
- I->Enqueue(Itm,URI,Description);
+ I->Enqueue(Item);
ToFetch++;
-
- if (Running == true)
- I->Startup();
-
+
// Some trace stuff
if (Debug == true)
{
- clog << "Fetching " << URI << endl;
- clog << " to " << Itm->DestFile << endl;
- clog << " Queue is: " << QueueName(URI) << endl;
+ clog << "Fetching " << Item.URI << endl;
+ clog << " to " << Item.Owner->DestFile << endl;
+ clog << " Queue is: " << QueueName(Item.URI) << endl;
}
}
/*}}}*/
// Acquire::Dequeue - Remove an item from all queues /*{{{*/
// ---------------------------------------------------------------------
-/* */
+/* This is called when an item is finished being fetched. It removes it
+ from all the queues */
void pkgAcquire::Dequeue(Item *Itm)
{
Queue *I = Queues;
+ bool Res = false;
for (; I != 0; I = I->Next)
- I->Dequeue(Itm);
- ToFetch--;
+ Res |= I->Dequeue(Itm);
+
+ if (Debug == true)
+ clog << "Dequeuing " << Itm->DestFile << endl;
+ if (Res == true)
+ ToFetch--;
}
/*}}}*/
// Acquire::QueueName - Return the name of the queue for this URI /*{{{*/
/* The string returned depends on the configuration settings and the
method parameters. Given something like http://foo.org/bar it can
return http://foo.org or http */
-string pkgAcquire::QueueName(string URI)
+string pkgAcquire::QueueName(string Uri)
{
- const MethodConfig *Config = GetConfig(URIAccess(URI));
+ URI U(Uri);
+
+ const MethodConfig *Config = GetConfig(U.Access);
if (Config == 0)
return string();
/* Single-Instance methods get exactly one queue per URI. This is
also used for the Access queue method */
if (Config->SingleInstance == true || QueueMode == QueueAccess)
- return URIAccess(URI);
-
- // Host based queue
- string::iterator I = URI.begin();
- for (; I < URI.end() && *I != ':'; I++);
- for (; I < URI.end() && (*I == '/' || *I == ':'); I++);
- for (; I < URI.end() && *I != '/'; I++);
-
- return string(URI,0,I - URI.begin());
+ return U.Access;
+
+ return U.Access + ':' + U.Host;
}
/*}}}*/
// Acquire::GetConfig - Fetch the configuration information /*{{{*/
/*}}}*/
// Acquire::RunFds - Deal with active FDs /*{{{*/
// ---------------------------------------------------------------------
-/* Dispatch active FDs over to the proper workers */
+/* Dispatch active FDs over to the proper workers. It is very important
+ that a worker never be erased while this is running! The queue class
+ should never erase a worker except during shutdown processing. */
void pkgAcquire::RunFds(fd_set *RSet,fd_set *WSet)
{
for (Worker *I = Workers; I != 0; I = I->NextAcquire)
for (Queue *I = Queues; I != 0; I = I->Next)
I->Startup();
+ if (Log != 0)
+ Log->Start();
+
// Run till all things have been acquired
+ struct timeval tv;
+ tv.tv_sec = 0;
+ tv.tv_usec = 500000;
while (ToFetch > 0)
{
fd_set RFds;
FD_ZERO(&WFds);
SetFds(Highest,&RFds,&WFds);
- if (select(Highest+1,&RFds,&WFds,0,0) <= 0)
+ int Res = select(Highest+1,&RFds,&WFds,0,&tv);
+ if (Res < 0)
{
- Running = false;
- return _error->Errno("select","Select has failed");
+ _error->Errno("select","Select has failed");
+ break;
}
-
+
RunFds(&RFds,&WFds);
+ if (_error->PendingError() == true)
+ break;
+
+ // Timeout, notify the log class
+ if (Res == 0 || (Log != 0 && Log->Update == true))
+ {
+ 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->Stop();
+ // Shut down the acquire bits
+ Running = false;
for (Queue *I = Queues; I != 0; I = I->Next)
I->Shutdown();
- Running = false;
- return true;
+ return _error->PendingError();
+}
+ /*}}}*/
+// Acquire::Bump - Called when an item is dequeued /*{{{*/
+// ---------------------------------------------------------------------
+/* This routine bumps idle queues in hopes that they will be able to fetch
+ the dequeued item */
+void pkgAcquire::Bump()
+{
+ for (Queue *I = Queues; I != 0; I = I->Next)
+ I->Bump();
}
/*}}}*/
+// Acquire::WorkerStep - Step to the next worker /*{{{*/
+// ---------------------------------------------------------------------
+/* Not inlined to advoid including acquire-worker.h */
+pkgAcquire::Worker *pkgAcquire::WorkerStep(Worker *I)
+{
+ return I->NextAcquire;
+};
+ /*}}}*/
// Acquire::MethodConfig::MethodConfig - Constructor /*{{{*/
// ---------------------------------------------------------------------
// Queue::Enqueue - Queue an item to the queue /*{{{*/
// ---------------------------------------------------------------------
/* */
-void pkgAcquire::Queue::Enqueue(Item *Owner,string URI,string Description)
+void pkgAcquire::Queue::Enqueue(ItemDesc &Item)
{
// Create a new item
- QItem *I = new QItem;
+ QItem *I = new QItem;
I->Next = Items;
Items = I;
+ *I = Item;
- // Fill it in
- Items->Owner = Owner;
- Items->URI = URI;
- Items->Description = Description;
- Owner->QueueCounter++;
+ Item.Owner->QueueCounter++;
+ if (Items->Next == 0)
+ Cycle();
}
/*}}}*/
// Queue::Dequeue - Remove an item from the queue /*{{{*/
// ---------------------------------------------------------------------
-/* */
-void pkgAcquire::Queue::Dequeue(Item *Owner)
+/* We return true if we hit something*/
+bool pkgAcquire::Queue::Dequeue(Item *Owner)
{
+ bool Res = false;
+
QItem **I = &Items;
for (; *I != 0;)
{
*I = (*I)->Next;
Owner->QueueCounter--;
delete Jnk;
+ Res = true;
}
else
I = &(*I)->Next;
}
+
+ return Res;
}
/*}}}*/
// Queue::Startup - Start the worker processes /*{{{*/
{
Shutdown();
- pkgAcquire::MethodConfig *Cnf = Owner->GetConfig(URIAccess(Name));
+ URI U(Name);
+ pkgAcquire::MethodConfig *Cnf = Owner->GetConfig(U.Access);
if (Cnf == 0)
return false;
- Workers = new Worker(this,Cnf);
+ Workers = new Worker(this,Cnf,Owner->Log);
Owner->Add(Workers);
if (Workers->Start() == false)
return false;
-
- Items->Worker = Workers;
- Workers->QueueItem(Items);
- return true;
+ return Cycle();
}
/*}}}*/
// Queue::Shutdown - Shutdown the worker processes /*{{{*/
// Queue::ItemDone - Item has been completed /*{{{*/
// ---------------------------------------------------------------------
/* The worker signals this which causes the item to be removed from the
- queue. */
+ queue. If this is the last queue instance then it is removed from the
+ main queue too.*/
bool pkgAcquire::Queue::ItemDone(QItem *Itm)
{
- Dequeue(Itm->Owner);
+ if (Itm->Owner->QueueCounter <= 1)
+ Owner->Dequeue(Itm->Owner);
+ else
+ {
+ Dequeue(Itm->Owner);
+ Owner->Bump();
+ }
- if (Items == 0)
+ return Cycle();
+}
+ /*}}}*/
+// Queue::Cycle - Queue new items into the method /*{{{*/
+// ---------------------------------------------------------------------
+/* This locates a new idle item and sends it to the worker */
+bool pkgAcquire::Queue::Cycle()
+{
+ if (Items == 0 || Workers == 0)
+ return true;
+
+ // 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;
+
+ I->Worker = Workers;
+ I->Owner->Status = pkgAcquire::Item::StatFetching;
+ return Workers->QueueItem(I);
+}
+ /*}}}*/
+// Queue::Bump - Fetch any pending objects if we are idle /*{{{*/
+// ---------------------------------------------------------------------
+/* */
+void pkgAcquire::Queue::Bump()
+{
+}
+ /*}}}*/
- Items->Worker = Workers;
- Items->Owner->Status = pkgAcquire::Item::StatFetching;
- return Workers->QueueItem(Items);
+// AcquireStatus::pkgAcquireStatus - Constructor /*{{{*/
+// ---------------------------------------------------------------------
+/* */
+pkgAcquireStatus::pkgAcquireStatus()
+{
+ Start();
+}
+ /*}}}*/
+// AcquireStatus::Pulse - Called periodically /*{{{*/
+// ---------------------------------------------------------------------
+/* 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)
+{
+ TotalBytes = 0;
+ CurrentBytes = 0;
+
+ // Compute the total number of bytes to fetch
+ unsigned int Unknown = 0;
+ unsigned int Count = 0;
+ for (pkgAcquire::Item **I = Owner->ItemsBegin(); I != Owner->ItemsEnd();
+ I++, Count++)
+ {
+ TotalBytes += (*I)->FileSize;
+ if ((*I)->Complete == true)
+ CurrentBytes += (*I)->FileSize;
+ if ((*I)->FileSize == 0 && (*I)->Complete == false)
+ Unknown++;
+ }
+
+ // Compute the current completion
+ for (pkgAcquire::Worker *I = Owner->WorkersBegin(); I != 0;
+ I = Owner->WorkerStep(I))
+ if (I->CurrentItem != 0 && I->CurrentItem->Owner->Complete == false)
+ CurrentBytes += 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;
+
+ // Compute the CPS
+ struct timeval NewTime;
+ gettimeofday(&NewTime,0);
+ 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;
+
+ // Borrow
+ if (usdiff < 0)
+ {
+ usdiff += 1000000;
+ sdiff--;
+ }
+
+ // Compute the CPS value
+ CurrentCPS = (CurrentBytes - LastBytes)/(sdiff + usdiff/1000000.0);
+ LastBytes = CurrentBytes;
+ ElapsedTime = NewTime.tv_sec - StartTime.tv_sec;
+ Time = NewTime;
+ }
+}
+ /*}}}*/
+// AcquireStatus::Start - Called when the download is started /*{{{*/
+// ---------------------------------------------------------------------
+/* We just reset the counters */
+void pkgAcquireStatus::Start()
+{
+ gettimeofday(&Time,0);
+ gettimeofday(&StartTime,0);
+ LastBytes = 0;
+ CurrentCPS = 0;
+ CurrentBytes = 0;
+ TotalBytes = 0;
+ FetchedBytes = 0;
+ ElapsedTime = 0;
+}
+ /*}}}*/
+// pkgAcquireStatus::Stop - Finished downloading /*{{{*/
+// ---------------------------------------------------------------------
+/* This accurately computes the elapsed time and the total overall CPS. */
+void pkgAcquireStatus::Stop()
+{
+ // Compute the CPS and elapsed time
+ struct timeval NewTime;
+ gettimeofday(&NewTime,0);
+
+ // Compute the delta time with full accuracy
+ long usdiff = NewTime.tv_usec - StartTime.tv_usec;
+ long sdiff = NewTime.tv_sec - StartTime.tv_sec;
+
+ // Borrow
+ if (usdiff < 0)
+ {
+ usdiff += 1000000;
+ sdiff--;
+ }
+
+ // Compute the CPS value
+ CurrentCPS = FetchedBytes/(sdiff + usdiff/1000000.0);
+ LastBytes = CurrentBytes;
+ ElapsedTime = sdiff;
+}
+ /*}}}*/
+// AcquireStatus::Fetched - Called when a byte set has been fetched /*{{{*/
+// ---------------------------------------------------------------------
+/* This is used to get accurate final transfer rate reporting. */
+void pkgAcquireStatus::Fetched(unsigned long Size,unsigned long Resume)
+{
+ FetchedBytes += Size - Resume;
}
/*}}}*/
projects / apt.git / blobdiff