350 lines
12 KiB
Python
350 lines
12 KiB
Python
# ----------------------------------------------------------------------------
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# pyglet
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# Copyright (c) 2006-2008 Alex Holkner
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# Copyright (c) 2008-2020 pyglet contributors
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# All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions
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# are met:
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#
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# * Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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# * Redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in
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# the documentation and/or other materials provided with the
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# distribution.
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# * Neither the name of pyglet nor the names of its
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# contributors may be used to endorse or promote products
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# derived from this software without specific prior written
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# permission.
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#
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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# COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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# CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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# POSSIBILITY OF SUCH DAMAGE.
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# ----------------------------------------------------------------------------
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"""Functions for loading dynamic libraries.
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These extend and correct ctypes functions.
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"""
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import os
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import re
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import sys
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import ctypes
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import ctypes.util
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import pyglet
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_debug_lib = pyglet.options['debug_lib']
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_debug_trace = pyglet.options['debug_trace']
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_is_pyglet_doc_run = getattr(sys, "is_pyglet_doc_run", False)
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if pyglet.options['search_local_libs']:
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script_path = pyglet.resource.get_script_home()
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cwd = os.getcwd()
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_local_lib_paths = [script_path, os.path.join(script_path, 'lib'), os.path.join(cwd, 'lib')]
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if pyglet.compat_platform == 'win32':
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os.environ["PATH"] += os.pathsep + os.pathsep.join(_local_lib_paths)
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else:
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_local_lib_paths = None
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class _TraceFunction:
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def __init__(self, func):
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self.__dict__['_func'] = func
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def __str__(self):
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return self._func.__name__
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def __call__(self, *args, **kwargs):
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return self._func(*args, **kwargs)
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def __getattr__(self, name):
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return getattr(self._func, name)
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def __setattr__(self, name, value):
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setattr(self._func, name, value)
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class _TraceLibrary:
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def __init__(self, library):
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self._library = library
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print(library)
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def __getattr__(self, name):
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func = getattr(self._library, name)
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f = _TraceFunction(func)
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return f
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if _is_pyglet_doc_run:
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class LibraryMock:
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"""Mock library used when generating documentation."""
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def __getattr__(self, name):
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return LibraryMock()
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def __setattr__(self, name, value):
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pass
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def __call__(self, *args, **kwargs):
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return LibraryMock()
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class LibraryLoader:
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platform = pyglet.compat_platform
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# this is only for library loading, don't include it in pyglet.platform
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if platform == 'cygwin':
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platform = 'win32'
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def load_library(self, *names, **kwargs):
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"""Find and load a library.
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More than one name can be specified, they will be tried in order.
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Platform-specific library names (given as kwargs) are tried first.
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Raises ImportError if library is not found.
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"""
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if _is_pyglet_doc_run:
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return LibraryMock()
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if 'framework' in kwargs and self.platform == 'darwin':
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return self.load_framework(kwargs['framework'])
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if not names:
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raise ImportError("No library name specified")
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platform_names = kwargs.get(self.platform, [])
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if isinstance(platform_names, str):
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platform_names = [platform_names]
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elif type(platform_names) is tuple:
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platform_names = list(platform_names)
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if self.platform.startswith('linux'):
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for name in names:
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libname = self.find_library(name)
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platform_names.append(libname or 'lib%s.so' % name)
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platform_names.extend(names)
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for name in platform_names:
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try:
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lib = ctypes.cdll.LoadLibrary(name)
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if _debug_lib:
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print(name)
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if _debug_trace:
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lib = _TraceLibrary(lib)
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return lib
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except OSError as o:
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path = self.find_library(name)
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if path:
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try:
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lib = ctypes.cdll.LoadLibrary(path)
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if _debug_lib:
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print(path)
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if _debug_trace:
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lib = _TraceLibrary(lib)
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return lib
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except OSError:
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pass
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elif self.platform == "win32" and o.winerror != 126:
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raise ImportError("Unexpected error loading library %s: %s" % (name, str(o)))
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raise ImportError('Library "%s" not found.' % names[0])
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def find_library(self, name):
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return ctypes.util.find_library(name)
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@staticmethod
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def load_framework(name):
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raise RuntimeError("Can't load framework on this platform.")
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class MachOLibraryLoader(LibraryLoader):
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def __init__(self):
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if 'LD_LIBRARY_PATH' in os.environ:
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self.ld_library_path = os.environ['LD_LIBRARY_PATH'].split(':')
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else:
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self.ld_library_path = []
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if _local_lib_paths:
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# search first for local libs
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self.ld_library_path = _local_lib_paths + self.ld_library_path
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os.environ['LD_LIBRARY_PATH'] = ':'.join(self.ld_library_path)
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if 'DYLD_LIBRARY_PATH' in os.environ:
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self.dyld_library_path = os.environ['DYLD_LIBRARY_PATH'].split(':')
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else:
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self.dyld_library_path = []
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if 'DYLD_FALLBACK_LIBRARY_PATH' in os.environ:
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self.dyld_fallback_library_path = os.environ['DYLD_FALLBACK_LIBRARY_PATH'].split(':')
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else:
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self.dyld_fallback_library_path = [os.path.expanduser('~/lib'), '/usr/local/lib', '/usr/lib']
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def find_library(self, path):
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"""Implements the dylib search as specified in Apple documentation:
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http://developer.apple.com/library/content/documentation/DeveloperTools/Conceptual/DynamicLibraries/100-Articles/DynamicLibraryUsageGuidelines.html
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Before commencing the standard search, the method first checks
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the bundle's ``Frameworks`` directory if the application is running
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within a bundle (OS X .app).
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"""
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libname = os.path.basename(path)
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search_path = []
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if '.dylib' not in libname:
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libname = 'lib' + libname + '.dylib'
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# py2app support
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if getattr(sys, 'frozen', None) == 'macosx_app' and 'RESOURCEPATH' in os.environ:
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search_path.append(os.path.join(os.environ['RESOURCEPATH'],
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'..',
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'Frameworks',
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libname))
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# conda support
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if os.environ.get('CONDA_PREFIX', False):
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search_path.append(os.path.join(os.environ['CONDA_PREFIX'], 'lib', libname))
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# pyinstaller.py sets sys.frozen to True, and puts dylibs in
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# Contents/MacOS, which path pyinstaller puts in sys._MEIPASS
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if (hasattr(sys, 'frozen') and hasattr(sys, '_MEIPASS') and
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sys.frozen is True and pyglet.compat_platform == 'darwin'):
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search_path.append(os.path.join(sys._MEIPASS, libname))
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if '/' in path:
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search_path.extend([os.path.join(p, libname) for p in self.dyld_library_path])
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search_path.append(path)
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search_path.extend([os.path.join(p, libname) for p in self.dyld_fallback_library_path])
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else:
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search_path.extend([os.path.join(p, libname) for p in self.ld_library_path])
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search_path.extend([os.path.join(p, libname) for p in self.dyld_library_path])
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search_path.append(path)
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search_path.extend([os.path.join(p, libname) for p in self.dyld_fallback_library_path])
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for path in search_path:
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if os.path.exists(path):
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return path
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return None
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@staticmethod
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def load_framework(name):
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path = ctypes.util.find_library(name)
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# Hack for compatibility with macOS > 11.0
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if path is None:
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frameworks = {
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'AGL': '/System/Library/Frameworks/AGL.framework/AGL',
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'IOKit': '/System/Library/Frameworks/IOKit.framework/IOKit',
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'OpenAL': '/System/Library/Frameworks/OpenAL.framework/OpenAL',
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'OpenGL': '/System/Library/Frameworks/OpenGL.framework/OpenGL'
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}
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path = frameworks.get(name)
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if path:
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lib = ctypes.cdll.LoadLibrary(path)
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if _debug_lib:
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print(path)
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if _debug_trace:
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lib = _TraceLibrary(lib)
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return lib
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raise ImportError("Can't find framework %s." % name)
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class LinuxLibraryLoader(LibraryLoader):
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_ld_so_cache = None
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_local_libs_cache = None
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@staticmethod
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def _find_libs(directories):
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cache = {}
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lib_re = re.compile(r'lib(.*)\.so(?:$|\.)')
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for directory in directories:
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try:
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for file in os.listdir(directory):
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match = lib_re.match(file)
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if match:
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# Index by filename
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path = os.path.join(directory, file)
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if file not in cache:
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cache[file] = path
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# Index by library name
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library = match.group(1)
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if library not in cache:
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cache[library] = path
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except OSError:
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pass
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return cache
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def _create_ld_so_cache(self):
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# Recreate search path followed by ld.so. This is going to be
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# slow to build, and incorrect (ld.so uses ld.so.cache, which may
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# not be up-to-date). Used only as fallback for distros without
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# /sbin/ldconfig.
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#
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# We assume the DT_RPATH and DT_RUNPATH binary sections are omitted.
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directories = []
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try:
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directories.extend(os.environ['LD_LIBRARY_PATH'].split(':'))
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except KeyError:
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pass
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try:
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with open('/etc/ld.so.conf') as fid:
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directories.extend([dir.strip() for dir in fid])
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except IOError:
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pass
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directories.extend(['/lib', '/usr/lib'])
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self._ld_so_cache = self._find_libs(directories)
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def find_library(self, path):
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# search first for local libs
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if _local_lib_paths:
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if not self._local_libs_cache:
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self._local_libs_cache = self._find_libs(_local_lib_paths)
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if path in self._local_libs_cache:
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return self._local_libs_cache[path]
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# ctypes tries ldconfig, gcc and objdump. If none of these are
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# present, we implement the ld-linux.so search path as described in
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# the man page.
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result = ctypes.util.find_library(path)
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if result:
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return result
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if self._ld_so_cache is None:
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self._create_ld_so_cache()
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return self._ld_so_cache.get(path)
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if pyglet.compat_platform == 'darwin':
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loader = MachOLibraryLoader()
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elif pyglet.compat_platform.startswith('linux'):
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loader = LinuxLibraryLoader()
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else:
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loader = LibraryLoader()
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load_library = loader.load_library
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