X-Git-Url: https://git.saurik.com/apt.git/blobdiff_plain/a72ace2091afd833e9359514644676c6bca55d96..7049d16d301fc4a26f27d3cd39c95a01003aabb6:/apt-pkg/acquire.cc

diff --git a/apt-pkg/acquire.cc b/apt-pkg/acquire.cc
index 54de9916e..80624f9d3 100644
--- a/apt-pkg/acquire.cc
+++ b/apt-pkg/acquire.cc
@@ -1,6 +1,6 @@
 // -*- mode: cpp; mode: fold -*-
 // Description								/*{{{*/
-// $Id: acquire.cc,v 1.19 1998/11/29 01:24:19 jgg Exp $
+// $Id: acquire.cc,v 1.29 1999/03/16 00:43:55 jgg Exp $
 /* ######################################################################
 
    Acquire - File Acquiration
@@ -21,7 +21,7 @@
 #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>
@@ -297,7 +297,13 @@ bool pkgAcquire::Run()
       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");
@@ -413,6 +419,22 @@ unsigned long pkgAcquire::FetchNeeded()
    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			/*{{{*/
 // ---------------------------------------------------------------------
@@ -436,6 +458,8 @@ pkgAcquire::Queue::Queue(string Name,pkgAcquire *Owner) : Name(Name),
    Items = 0;
    Next = 0;
    Workers = 0;
+   MaxPipeDepth = 1;
+   PipeDepth = 0;
 }
 									/*}}}*/
 // Queue::~Queue - Destructor						/*{{{*/
@@ -474,9 +498,12 @@ void pkgAcquire::Queue::Enqueue(ItemDesc &Item)
 									/*}}}*/
 // 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;
@@ -514,6 +541,14 @@ bool pkgAcquire::Queue::Startup()
    if (Workers->Start() == false)
       return false;
    
+   /* When pipelining we commit 10 items. This needs to change when we
+      added other source retry to have cycle maintain a pipeline depth
+      on its own. */
+   if (Cnf->Pipeline == true)
+      MaxPipeDepth = 10;
+   else
+      MaxPipeDepth = 1;
+   
    return Cycle();
 }
 									/*}}}*/
@@ -534,7 +569,7 @@ bool pkgAcquire::Queue::Shutdown()
    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)
@@ -552,6 +587,10 @@ pkgAcquire::Queue::QItem *pkgAcquire::Queue::FindItem(string URI,pkgAcquire::Wor
    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
@@ -565,32 +604,44 @@ bool pkgAcquire::Queue::ItemDone(QItem *Itm)
 									/*}}}*/
 // 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();
 }
 									/*}}}*/
 
@@ -655,24 +706,16 @@ void pkgAcquireStatus::Pulse(pkgAcquire *Owner)
    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);
+	 CurrentCPS = (CurrentBytes - LastBytes)/Delta;
       LastBytes = CurrentBytes;
-      ElapsedTime = NewTime.tv_sec - StartTime.tv_sec;
+      ElapsedTime = (unsigned long)Delta;
       Time = NewTime;
    }
 }