mirror of https://gitlab.com/ita1024/waf.git
151 lines
4.0 KiB
Python
151 lines
4.0 KiB
Python
#!/usr/bin/env python
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# encoding: utf-8
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# Thomas Nagy, 2006-2010 (ita)
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"""
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Build as batches.
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Instead of compiling object files one by one, c/c++ compilers are often able to compile at once:
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cc -c ../file1.c ../file2.c ../file3.c
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Files are output on the directory where the compiler is called, and dependencies are more difficult
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to track (do not run the command on all source files if only one file changes)
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As such, we do as if the files were compiled one by one, but no command is actually run:
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replace each cc/cpp Task by a TaskSlave. A new task called TaskMaster collects the
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signatures from each slave and finds out the command-line to run.
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Just import this module in the configuration (no other change required).
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This is provided as an example, for performance unity builds are recommended (fewer tasks and fewer jobs to execute).
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"""
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import os
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from waflib import TaskGen, Task, Build, Logs
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from waflib.TaskGen import extension, feature, before_method, after_method
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MAX_BATCH = 50
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c_str = '${CC} ${CFLAGS} ${CPPFLAGS} ${FRAMEWORKPATH_ST:FRAMEWORKPATH} ${CPPPATH_ST:INCPATHS} ${DEFINES_ST:DEFINES} -c ${SRCLST}'
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#c_str = '${CC} ${CCFLAGS} ${CPPFLAGS} ${_CCINCFLAGS} ${_CCDEFFLAGS} -c ${SRCLST}'
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c_fun, _ = Task.compile_fun_noshell(c_str)
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cxx_str = '${CXX} ${CXXFLAGS} ${CPPFLAGS} ${FRAMEWORKPATH_ST:FRAMEWORKPATH} ${CPPPATH_ST:INCPATHS} ${DEFINES_ST:DEFINES} -c ${SRCLST}'
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#cxx_str = '${CXX} ${CXXFLAGS} ${CPPFLAGS} ${_CXXINCFLAGS} ${_CXXDEFFLAGS} -c ${SRCLST}'
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cxx_fun, _ = Task.compile_fun_noshell(cxx_str)
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count = 70000
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class batch_task(Task.Task):
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color = 'RED'
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after = ['c', 'cxx']
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before = ['cprogram', 'cshlib', 'cstlib', 'cxxprogram', 'cxxshlib', 'cxxstlib']
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def __str__(self):
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return '(batch compilation for %d slaves)\n' % len(self.slaves)
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def __init__(self, *k, **kw):
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Task.Task.__init__(self, *k, **kw)
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self.slaves = []
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self.inputs = []
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self.hasrun = 0
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global count
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count += 1
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self.idx = count
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def add_slave(self, slave):
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self.slaves.append(slave)
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self.set_run_after(slave)
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def runnable_status(self):
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for t in self.run_after:
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if not t.hasrun:
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return Task.ASK_LATER
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for t in self.slaves:
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#if t.executed:
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if t.hasrun != Task.SKIPPED:
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return Task.RUN_ME
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return Task.SKIP_ME
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def run(self):
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outputs = []
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self.outputs = []
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srclst = []
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slaves = []
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for t in self.slaves:
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if t.hasrun != Task.SKIPPED:
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slaves.append(t)
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srclst.append(t.inputs[0].abspath())
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self.env.SRCLST = srclst
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self.cwd = slaves[0].inputs[0].parent.get_bld().abspath()
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if self.slaves[0].__class__.__name__ == 'c':
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ret = c_fun(self)
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else:
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ret = cxx_fun(self)
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if ret:
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return ret
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for t in slaves:
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t.old_post_run()
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from waflib.Tools import c, cxx
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def hook(name):
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def n_hook(self, node):
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task = self.create_task(name, node, node.change_ext('.o'))
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try:
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self.compiled_tasks.append(task)
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except AttributeError:
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self.compiled_tasks = [task]
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if not getattr(self, 'masters', None):
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self.masters = {}
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self.allmasters = []
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if not node.parent in self.masters:
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m = self.masters[node.parent] = self.master = self.create_task('batch')
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self.allmasters.append(m)
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else:
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m = self.masters[node.parent]
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if len(m.slaves) > MAX_BATCH:
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m = self.masters[node.parent] = self.master = self.create_task('batch')
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self.allmasters.append(m)
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m.add_slave(task)
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return task
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return n_hook
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extension('.c')(hook('c'))
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extension('.cpp','.cc','.cxx','.C','.c++')(hook('cxx'))
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@feature('cprogram', 'cshlib', 'cstaticlib', 'cxxprogram', 'cxxshlib', 'cxxstlib')
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@after_method('apply_link')
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def link_after_masters(self):
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if getattr(self, 'allmasters', None):
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for m in self.allmasters:
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self.link_task.set_run_after(m)
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# Modify the c and cxx task classes - in theory it would be better to
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# create subclasses and to re-map the c/c++ extensions
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#
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for x in ('c', 'cxx'):
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t = Task.classes[x]
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def run(self):
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pass
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def post_run(self):
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#self.executed=1
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pass
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setattr(t, 'oldrun', t.__dict__['run'])
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setattr(t, 'run', run)
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setattr(t, 'old_post_run', t.post_run)
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setattr(t, 'post_run', post_run)
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