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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.
"""
import specs.stdapi as stdapi
def function_pointer_type(function):
return '__PFN' + function.name.upper()
def function_pointer_value(function):
return '__' + function.name + '_ptr'
class Dispatcher:
def header(self):
# Must be implemented by derived classes, which should define, declare,
# or implement something like:
#
# typedef void (*__PROC)(void);
#
# static __PROC __getPublicProcAddress(const char *name);
# static __PROC __getPrivateProcAddress(const char *name);
#
raise NotImplementedError
def dispatch_api(self, api):
for function in api.functions:
self.dispatch_function(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 api.functions:
if self.is_public_function(function):
print '#define __%s %s' % (function.name, function.name)
else:
print '#define %s __%s' % (function.name, function.name)
print '#endif /* RETRACE */'
print
def dispatch_function(self, function):
if self.is_public_function(function):
print '#ifndef RETRACE'
print
ptype = function_pointer_type(function)
pvalue = function_pointer_value(function)
print 'typedef ' + function.prototype('* %s' % ptype) + ';'
print 'static %s %s = NULL;' % (ptype, pvalue)
print
print 'static inline ' + function.prototype('__' + function.name) + ' {'
print ' const char *__name = "%s";' % function.name
if function.type is stdapi.Void:
ret = ''
else:
ret = 'return '
self.get_true_pointer(function)
print ' %s%s(%s);' % (ret, pvalue, ', '.join([str(arg.name) for arg in function.args]))
print '}'
print
if self.is_public_function(function):
print '#endif /* !RETRACE */'
print
def is_public_function(self, function):
return True
def get_true_pointer(self, function):
ptype = function_pointer_type(function)
pvalue = function_pointer_value(function)
if self.is_public_function(function):
get_proc_address = '__getPublicProcAddress'
else:
get_proc_address = '__getPrivateProcAddress'
print ' if (!%s) {' % (pvalue,)
print ' %s = (%s)%s(__name);' % (pvalue, ptype, get_proc_address)
print ' if (!%s) {' % (pvalue,)
self.fail_function(function)
print ' }'
print ' }'
def fail_function(self, function):
if function.type is stdapi.Void or function.fail is not None:
print r' OS::DebugMessage("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::DebugMessage("error: unavailable function %s\n", __name);'
print r' OS::Abort();'
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