aboutsummaryrefslogtreecommitdiff
path: root/tools/mhmake/src/commandqueue.cpp
blob: db14ac38dafe81f4309067f2584d2a06161d0957 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
#include "stdafx.h"

#include "commandqueue.h"
#include "mhmakeparser.h"

commandqueue::commandqueue() :
    m_NrActiveEntries(0)
{
  SYSTEM_INFO SysInfo;
  GetSystemInfo(&SysInfo);
  m_MaxNrCommandsInParallel=SysInfo.dwNumberOfProcessors;

  m_pActiveProcesses=new HANDLE[m_MaxNrCommandsInParallel];
  m_pActiveEntries= new activeentry[m_MaxNrCommandsInParallel];
}

commandqueue::~commandqueue()
{
  delete [] m_pActiveProcesses;
  delete [] m_pActiveEntries;
}

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(1,NrParallelBuilds);
  m_MaxNrCommandsInParallel=NrParallelBuilds;
  delete [] m_pActiveProcesses;
  delete [] m_pActiveEntries;
  m_pActiveProcesses=new HANDLE[NrParallelBuilds];
  m_pActiveEntries= new activeentry[NrParallelBuilds];
}

void commandqueue::ThrowCommandExecutionError(activeentry *pActiveEntry)
{
  refptr<fileinfo> pTarget=pActiveEntry->pTarget;
  const string    &Command=pActiveEntry->Command;
  mhmakeparser    *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;
}

void commandqueue::RemoveActiveEntry(unsigned Entry)
{
//cout << "Remove entry "<<Entry<<" of "<<m_NrActiveEntries<<" from queue:"<<m_pActiveEntries[Entry].pTarget->GetQuotedFullFileName()<<endl;
  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]=activeentry();
  m_pActiveProcesses[Entry]=NULL;
  m_NrActiveEntries--;
}

/* Start to execute next command, return true when command is completely executed
   upon return */
bool commandqueue::StartExecuteNextCommand(activeentry *pActiveEntry, HANDLE *pActiveProcess)
{
  refptr<fileinfo> pTarget=pActiveEntry->pTarget;
  mhmakeparser *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
    HANDLE hProcess=pMakefile->ExecuteCommand(Command,pActiveEntry->IgnoreError);
    if (hProcess==(HANDLE)-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(activeentry *pActiveEntry)
{
  refptr<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();
  mhmakeparser *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(const refptr<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();
  mhmakeparser *pMakefile=pRule->GetMakefile();
  vector<string>::iterator CommandIt=pRule->GetCommands().begin();
  activeentry *pActiveEntry=&m_pActiveEntries[m_NrActiveEntries];
  md5_starts( &pActiveEntry->md5ctx );

  pActiveEntry->pTarget=pTarget;
  pActiveEntry->CurrentCommandIt=CommandIt;
  pActiveEntry->pTarget=pTarget;

  while (1)
  {
    if (StartExecuteNextCommand(pActiveEntry, &m_pActiveProcesses[m_NrActiveEntries]))
    {
      pActiveEntry->CurrentCommandIt++;
      if (pActiveEntry->CurrentCommandIt==pRule->GetCommands().end())
      {
         // All commands executed
         break;
      }
    }
    else
    {
//cout << "Adding entry "<<m_NrActiveEntries<<" to queue:"<<pActiveEntry->pTarget->GetQuotedFullFileName()<<endl;
      m_NrActiveEntries++;
      return false;
    }
  }
  TargetBuildFinished(pActiveEntry);
  *pActiveEntry=activeentry();
  return true;
}


/* put the target in the execution queue or start executing immediately
*/
bool commandqueue::QueueTarget(const refptr<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(const refptr<fileinfo> &pTarget)
{
  if (!pTarget->IsBuilding())
    return pTarget->GetDate();

  while (1)
  {
    // First wait until one of the processes that are running is finished
    DWORD Ret=WaitForMultipleObjects(m_NrActiveEntries,m_pActiveProcesses,FALSE,INFINITE);
    if (Ret>=m_NrActiveEntries)
      throw("fatal error: unexpected return value of WaitForMultipleObjects " + stringify(Ret));
    activeentry *pActiveEntry=&m_pActiveEntries[Ret];
    refptr<fileinfo> pCurrentTarget=pActiveEntry->pTarget;
    refptr<rule> pRule=pCurrentTarget->GetRule();

      // First check the error code of the command
    DWORD ExitCode=0;
    HANDLE 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)
            throw("Fatal error: WaitForTarget "+pTarget->GetQuotedFullFileName()+": no active targets anymore.");
          else
            break;
        }
        else
        {
          refptr<fileinfo> pNewTarget=m_Queue.front();
          m_Queue.pop();
          if (StartExecuteCommands(pNewTarget))
          {
            if (pNewTarget==pTarget)
              Return=true;
          }
          else
            break;
        }
      }
      if (Return)
        return pTarget->GetDate();
    }
  }

}