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##########################################################################
#
# Copyright 2010 VMware, Inc.
# All Rights Reserved.
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.
#
##########################################################################/
"""Generate DLL/SO dispatching functions.
"""
# Adjust path
import os.path
import sys
sys.path.insert(0, os.path.join(os.path.dirname(__file__), '..'))
import specs.stdapi as stdapi
def function_pointer_type(function):
return 'PFN_' + function.name.upper()
def function_pointer_value(function):
return '_' + function.name
class Dispatcher:
def dispatchModule(self, module):
self.dispatchModuleDecl(module)
self.dispatchModuleImpl(module)
def dispatchModuleDecl(self, module):
for function in module.functions:
self.dispatchFunctionDecl(module, function)
# define standard name aliases for convenience, but only when not
# tracing, as that would cause symbol clashing with the tracing
# functions
print '#ifdef RETRACE'
for function in module.functions:
print '#define %s _%s' % (function.name, function.name)
print '#endif /* RETRACE */'
print
def dispatchFunctionDecl(self, module, function):
ptype = function_pointer_type(function)
pvalue = function_pointer_value(function)
print 'typedef ' + function.prototype('* %s' % ptype) + ';'
print 'extern %s %s;' % (ptype, pvalue)
print
def dispatchModuleImpl(self, module):
for function in module.functions:
self.dispatchFunctionImpl(module, function)
def dispatchFunctionImpl(self, module, function):
ptype = function_pointer_type(function)
pvalue = function_pointer_value(function)
if function.type is stdapi.Void:
ret = ''
else:
ret = 'return '
print 'static ' + function.prototype('_fail_' + function.name) + ' {'
self.failFunction(function)
print '}'
print
print 'static ' + function.prototype('_get_' + function.name) + ' {'
self.invokeGetProcAddress(module, function)
print ' %s%s(%s);' % (ret, pvalue, ', '.join([str(arg.name) for arg in function.args]))
print '}'
print
print '%s %s = &%s;' % (ptype, pvalue, '_get_' + function.name)
print
def getProcAddressName(self, module, function):
raise NotImplementedError
def invokeGetProcAddress(self, module, function):
ptype = function_pointer_type(function)
pvalue = function_pointer_value(function)
getProcAddressName = self.getProcAddressName(module, function)
print ' %s _ptr;' % (ptype,)
print ' _ptr = (%s)%s("%s");' % (ptype, getProcAddressName, function.name)
print ' if (!_ptr) {'
print ' _ptr = &%s;' % ('_fail_' + function.name)
print ' }'
print ' %s = _ptr;' % (pvalue,)
def failFunction(self, function):
print r' const char *_name = "%s";' % function.name
if function.type is stdapi.Void or function.fail is not None:
print r' os::log("warning: ignoring call to unavailable function %s\n", _name);'
if function.type is stdapi.Void:
assert function.fail is None
print ' return;'
else:
assert function.fail is not None
print ' return %s;' % function.fail
else:
print r' os::log("error: unavailable function %s\n", _name);'
print r' os::abort();'
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