diff options
Diffstat (limited to 'tools/mhmake/src/commandqueue.cpp')
| -rw-r--r-- | tools/mhmake/src/commandqueue.cpp | 415 |
1 files changed, 415 insertions, 0 deletions
diff --git a/tools/mhmake/src/commandqueue.cpp b/tools/mhmake/src/commandqueue.cpp new file mode 100644 index 000000000..8ca842362 --- /dev/null +++ b/tools/mhmake/src/commandqueue.cpp @@ -0,0 +1,415 @@ +/* This file is part of mhmake.
+ *
+ * Copyright (C) 2001-2010 marha@sourceforge.net
+ *
+ * Mhmake is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Mhmake is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Mhmake. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+/* $Rev$ */
+
+#include "stdafx.h"
+
+#include "commandqueue.h"
+#include "mhmakefileparser.h"
+
+#ifndef WIN32
+
+#define INFINITE 0
+#define FALSE 0
+
+static int Status;
+unsigned WaitForMultipleObjects(int Nbr, mh_pid_t *phProcesses, int, int)
+{
+ mh_pid_t ID=waitpid(0,&Status,0);
+ for (int i=0; i<Nbr; i++)
+ {
+ if (ID==phProcesses[i])
+ return i;
+ }
+ return -1;
+}
+
+typedef unsigned DWORD;
+
+int GetExitCodeProcess(mh_pid_t hProcess, DWORD *pExitCode)
+{
+ *pExitCode=Status;
+ return true;
+}
+
+#define CloseHandle(Handle)
+
+#endif
+
+
+commandqueue::commandqueue() :
+ m_NrActiveEntries(0)
+{
+#ifdef WIN32
+ SYSTEM_INFO SysInfo;
+ GetSystemInfo(&SysInfo);
+ m_MaxNrCommandsInParallel=SysInfo.dwNumberOfProcessors;
+
+ m_DummyWaitHandle=(mh_pid_t)CreateEvent(NULL,TRUE,FALSE,NULL);
+#else
+ FILE *pFile=fopen("/proc/cpuinfo","r");
+ const char szProc[]="processor";
+ int cur=0;
+ int NrProcs=0;
+ while (!feof(pFile))
+ {
+ char In=fgetc(pFile);
+ if (In=='\n')
+ {
+ cur=0;
+ }
+ else
+ {
+ if (cur<=sizeof(szProc) && In==szProc[cur])
+ {
+ if (!szProc[cur+1])
+ {
+ NrProcs++;
+ }
+ }
+ cur++;
+ }
+ }
+
+ m_MaxNrCommandsInParallel=NrProcs;
+ m_DummyWaitHandle=(mh_pid_t)-1;
+
+#endif
+
+ m_pActiveProcesses=new mh_pid_t[m_MaxNrCommandsInParallel];
+ m_pActiveEntries= new refptr<activeentry>[m_MaxNrCommandsInParallel];
+}
+
+commandqueue::~commandqueue()
+{
+ delete [] m_pActiveProcesses;
+ delete [] m_pActiveEntries;
+ #ifdef WIN32
+ CloseHandle(m_DummyWaitHandle);
+ #endif
+}
+
+void commandqueue::SetNrParallelBuilds(unsigned NrParallelBuilds)
+{
+ if (m_NrActiveEntries)
+ throw("Changing of number of parallel builds is only allowed when no commands are executing");
+ NrParallelBuilds=max(1u,NrParallelBuilds);
+ m_MaxNrCommandsInParallel=NrParallelBuilds;
+ delete [] m_pActiveProcesses;
+ delete [] m_pActiveEntries;
+ m_pActiveProcesses=new mh_pid_t[NrParallelBuilds];
+ m_pActiveEntries= new refptr<activeentry>[NrParallelBuilds];
+}
+
+void commandqueue::ThrowCommandExecutionError(refptr<activeentry> pActiveEntry)
+{
+ fileinfo* pTarget=pActiveEntry->pTarget;
+ const string &Command=pActiveEntry->Command;
+ mhmakefileparser *pMakefile=pTarget->GetRule()->GetMakefile();
+
+ string ErrorMessage = string("Error running command: ")+ Command +"\n";
+ ErrorMessage += "Command defined in makefile: " + pMakefile->GetMakeDir()->GetQuotedFullFileName();
+ pTarget->SetCommandsMd5_32(0); /* Clear the md5 to make sure that the target is rebuild the next time mhmake is ran */
+ pMakefile->SetAutoDepsDirty(); /* We need to update the autodeps file if the md5 has been changed */
+ throw ErrorMessage;
+}
+
+refptr<commandqueue::activeentry> commandqueue::CreateActiveEntry(void)
+{
+ refptr<activeentry> pRet=new activeentry;
+ m_pActiveEntries[m_NrActiveEntries]=pRet;
+ m_pActiveProcesses[m_NrActiveEntries]=this->m_DummyWaitHandle;
+ m_NrActiveEntries++;
+ return pRet;
+}
+
+unsigned commandqueue::GetActiveEntryId(const refptr<activeentry> pActiveEntry) const
+{
+ unsigned i=0;
+ for (i=0; i<m_NrActiveEntries; i++)
+ if (m_pActiveEntries[i]==pActiveEntry)
+ return i;
+ throw("ActiveEntry not found for "+ pActiveEntry->pTarget->GetFullFileName());
+}
+
+void commandqueue::RemoveActiveEntry(unsigned Entry)
+{
+//cout << "Remove entry "<<Entry<<" of "<<m_NrActiveEntries<<" from queue:"<<m_pActiveEntries[Entry].pTarget->GetQuotedFullFileName()<<<<" ("<<m_pActiveEntries[Entry]<<")\n";
+ unsigned NrToMove=m_NrActiveEntries-Entry-1;
+ if (NrToMove)
+ {
+ for (unsigned i=0; i<NrToMove; i++)
+ {
+ unsigned EntryP1=Entry+1;
+ m_pActiveEntries[Entry]=m_pActiveEntries[EntryP1];
+ m_pActiveProcesses[Entry]=m_pActiveProcesses[EntryP1];
+ Entry=EntryP1;
+ }
+ }
+ m_pActiveEntries[Entry]=NULL;
+ m_pActiveProcesses[Entry]=NULL;
+ m_NrActiveEntries--;
+}
+
+/* Start to execute next command, return true when command is completely executed
+ upon return */
+bool commandqueue::StartExecuteNextCommand(refptr<activeentry> pActiveEntry, mh_pid_t *pActiveProcess)
+{
+ fileinfo* pTarget=pActiveEntry->pTarget;
+ mhmakefileparser *pMakefile=pTarget->GetRule()->GetMakefile();
+
+ pMakefile->SetRuleThatIsBuild(pTarget); // Make sure that the command expension is correct
+ string Command=pMakefile->ExpandExpression(*pActiveEntry->CurrentCommandIt);
+ pMakefile->ClearRuleThatIsBuild(); /* Make sure that further expansion is not taking this rule into account.*/
+ md5_update( &pActiveEntry->md5ctx, (uint8 *)Command.c_str(), (unsigned long)Command.size());
+
+ pActiveEntry->Command=Command;
+
+ #ifdef _DEBUG
+ if (g_pPrintDependencyCheck)
+ {
+ cout<<"-> "<<Command<<endl;
+ }
+ if (!g_GenProjectTree)
+ {
+ #endif
+ mh_pid_t hProcess=pMakefile->ExecuteCommand(Command,pActiveEntry->IgnoreError);
+ if (hProcess==(mh_pid_t)-1)
+ {
+ ThrowCommandExecutionError(pActiveEntry);
+ }
+ else if (!hProcess)
+ {
+ // Command already finished, so execute next command
+ return true;
+ }
+ else
+ {
+ // Command still executing, so add it to the list of handles to wait for
+ *pActiveProcess=hProcess;
+ return false;
+ }
+ #ifdef _DEBUG
+ }
+ #endif
+ return true;
+}
+
+void commandqueue::TargetBuildFinished(refptr<activeentry> pActiveEntry)
+{
+ fileinfo* pTarget=pActiveEntry->pTarget;
+
+ // Building of this target finished
+ uint32 Md5_32=md5_finish32( &pActiveEntry->md5ctx);
+ #ifdef _DEBUG
+ if (g_DoNotExecute||g_GenProjectTree)
+ pTarget->SetDateToNow();
+ else
+ #endif
+ pTarget->InvalidateDate();
+
+ pTarget->SetCommandsMd5_32(Md5_32); /* If the rule of the target was added with an implicit rule the targets in the rule is empty */
+
+ refptr<rule> pRule=pTarget->GetRule();
+ mhmakefileparser *pMakefile=pRule->GetMakefile();
+
+ pMakefile->AddTarget(pTarget);
+ pMakefile->SetAutoDepsDirty();
+ pRule->SetTargetsIsBuild(Md5_32);
+
+ #ifdef _DEBUG
+ if (g_pPrintDependencyCheck)
+ {
+ cout<<"Building "<<pTarget->GetQuotedFullFileName()<<" finished : "<< pTarget->GetDate() << endl;
+ }
+
+ if (!pMakefile->ImplicitSearch() && !pTarget->Exists() && !pTarget->IsPhony() && !g_DoNotExecute && !g_GenProjectTree)
+ {
+ // This is only a warning for phony messages
+ cout<<"Warning: don't know how to make "<<pTarget->GetQuotedFullFileName()<<"\nMake the rule a phony rule to avoid this warning (but only do it when it is really phony).\n";;
+ }
+ #endif
+
+ pTarget->ClearBuilding();
+}
+
+/* Start executing the commands of a target
+*/
+bool commandqueue::StartExecuteCommands(fileinfo* pTarget)
+{
+ cout << "Building " << pTarget->GetQuotedFullFileName()<<endl;
+ // We do not have to put it in the queue, we can start executing directly
+ refptr<rule> pRule=pTarget->GetRule();
+ mhmakefileparser *pMakefile=pRule->GetMakefile();
+ vector<string>::iterator CommandIt=pRule->GetCommands().begin();
+
+ refptr<activeentry> pActiveEntry=CreateActiveEntry();
+ mh_pid_t ActiveProcess;
+
+ md5_starts( &pActiveEntry->md5ctx );
+
+ pActiveEntry->pTarget=pTarget;
+ pActiveEntry->CurrentCommandIt=CommandIt;
+
+ while (1)
+ {
+ if (StartExecuteNextCommand(pActiveEntry, &ActiveProcess))
+ {
+ pActiveEntry->CurrentCommandIt++;
+ if (pActiveEntry->CurrentCommandIt==pRule->GetCommands().end())
+ {
+ // All commands executed
+ break;
+ }
+ }
+ else
+ {
+ m_pActiveProcesses[GetActiveEntryId(pActiveEntry)]=ActiveProcess; // We use GetActiveEntryId to avoid reentrancy problems
+ return false;
+ }
+ }
+ TargetBuildFinished(pActiveEntry);
+ RemoveActiveEntry(pActiveEntry);
+ return true;
+}
+
+
+/* put the target in the execution queue or start executing immediately
+*/
+bool commandqueue::QueueTarget(fileinfo* pTarget)
+{
+ pTarget->SetBuilding();
+ // First check if there is place in the active entries
+ if (m_NrActiveEntries==m_MaxNrCommandsInParallel)
+ {
+ // commands cannot be started yet
+ m_Queue.push(pTarget);
+ return true;
+ }
+ else
+ {
+ return !StartExecuteCommands(pTarget);
+ }
+}
+
+/* Wait for all the commands being executed of a target. In the mean time also continue
+ executing all other commands in the queue
+*/
+mh_time_t commandqueue::WaitForTarget(fileinfo *pTarget)
+{
+ if (!pTarget->IsBuilding())
+ return pTarget->GetDate();
+
+ while (1)
+ {
+ // First wait until one of the processes that are running is finished
+ if (m_NrActiveEntries==1 && m_pActiveProcesses[0]==this->m_DummyWaitHandle)
+ {
+ #ifdef _DEBUG
+ if (pTarget!=m_pActiveEntries[0]->pTarget)
+ throw("Wrong assumption: waiting for target " + pTarget->GetFullFileName() + " but in wait list is " + m_pActiveEntries[0]->pTarget->GetFullFileName());
+ #endif
+ pTarget->SetDateToNow();
+ return pTarget->GetDate(); // This is a reentrancy problem, assume that the target is just build
+ }
+ unsigned Ret=WaitForMultipleObjects(m_NrActiveEntries,m_pActiveProcesses,FALSE,INFINITE);
+ if (Ret>=m_NrActiveEntries)
+ #ifdef WIN32
+ throw("fatal error: unexpected return value of WaitForMultipleObjects " + stringify(Ret) + " " + stringify(GetLastError()));
+ #else
+ throw("fatal error: unexpected return value of WaitForMultipleObjects " + stringify(Ret));
+ #endif
+ refptr<activeentry> pActiveEntry=m_pActiveEntries[Ret];
+ fileinfo* pCurrentTarget=pActiveEntry->pTarget;
+ refptr<rule> pRule=pCurrentTarget->GetRule();
+
+ // First check the error code of the command
+ DWORD ExitCode=0;
+ mh_pid_t hProcess=m_pActiveProcesses[Ret];
+ if (!GetExitCodeProcess(hProcess,&ExitCode) || ExitCode)
+ {
+ if (pActiveEntry->IgnoreError)
+ {
+ cerr << "Error running command: "<<pActiveEntry->Command<<", but ignoring error\n";
+ }
+ else
+ ThrowCommandExecutionError(pActiveEntry);
+ }
+ CloseHandle(hProcess);
+
+ // Now check if we have to execute more commands for this target
+ pActiveEntry->CurrentCommandIt++;
+ while (pActiveEntry->CurrentCommandIt!=pRule->GetCommands().end())
+ {
+ if (!StartExecuteNextCommand(pActiveEntry, &m_pActiveProcesses[Ret]))
+ break; // We have to wait for end of command execution
+ pActiveEntry->CurrentCommandIt++;
+ }
+
+ if (pActiveEntry->CurrentCommandIt==pRule->GetCommands().end())
+ {
+ TargetBuildFinished(pActiveEntry);
+ // Target building finished, so remove it from the list of active entries
+ RemoveActiveEntry(Ret);
+
+ bool Return=false;
+ if (pTarget==pCurrentTarget)
+ {
+ Return = true;
+ }
+ // Check if we have other entries in the queue to start
+ while (1)
+ {
+ if (m_Queue.empty())
+ {
+ // There should still be active entries, otherwise this is a serious bug
+ if (!m_NrActiveEntries && !Return)
+ {
+ // This may happen when having multiple target rules and pTarget was build when on of the other targets
+ // was build. so first check if the pTarget was not build in the mean time. If so, this is not an error
+ if (pTarget->IsBuild())
+ {
+ Return=true;
+ break;
+ }
+ else
+ throw("Fatal error: WaitForTarget "+pTarget->GetQuotedFullFileName()+": no active targets anymore.");
+ }
+ else
+ break;
+ }
+ else
+ {
+ fileinfo* pNewTarget=m_Queue.front();
+ m_Queue.pop();
+ if (StartExecuteCommands(pNewTarget))
+ {
+ if (pNewTarget==pTarget)
+ Return=true;
+ }
+ else
+ break;
+ }
+ }
+ if (Return)
+ return pTarget->GetDate();
+ }
+ }
+
+}
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