本文整理汇总了Python中_cffi_backend.load_library方法的典型用法代码示例。如果您正苦于以下问题:Python _cffi_backend.load_library方法的具体用法?Python _cffi_backend.load_library怎么用?Python _cffi_backend.load_library使用的例子?那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类_cffi_backend
的用法示例。
在下文中一共展示了_cffi_backend.load_library方法的4个代码示例,这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞,您的评价将有助于系统推荐出更棒的Python代码示例。
示例1: _load_backend_lib
# 需要导入模块: import _cffi_backend [as 别名]
# 或者: from _cffi_backend import load_library [as 别名]
def _load_backend_lib(backend, name, flags):
import os
if name is None:
if sys.platform != "win32":
return backend.load_library(None, flags)
name = "c" # Windows: load_library(None) fails, but this works
# on Python 2 (backward compatibility hack only)
first_error = None
if '.' in name or '/' in name or os.sep in name:
try:
return backend.load_library(name, flags)
except OSError as e:
first_error = e
import ctypes.util
path = ctypes.util.find_library(name)
if path is None:
if name == "c" and sys.platform == "win32" and sys.version_info >= (3,):
raise OSError("dlopen(None) cannot work on Windows for Python 3 "
"(see http://bugs.python.org/issue23606)")
msg = ("ctypes.util.find_library() did not manage "
"to locate a library called %r" % (name,))
if first_error is not None:
msg = "%s. Additionally, %s" % (first_error, msg)
raise OSError(msg)
return backend.load_library(path, flags)
示例2: _load_backend_lib
# 需要导入模块: import _cffi_backend [as 别名]
# 或者: from _cffi_backend import load_library [as 别名]
def _load_backend_lib(backend, name, flags):
if name is None:
if sys.platform != "win32":
return backend.load_library(None, flags)
name = "c" # Windows: load_library(None) fails, but this works
# (backward compatibility hack only)
try:
if '.' not in name and '/' not in name:
raise OSError("library not found: %r" % (name,))
return backend.load_library(name, flags)
except OSError:
import ctypes.util
path = ctypes.util.find_library(name)
if path is None:
raise # propagate the original OSError
return backend.load_library(path, flags)
示例3: _load_backend_lib
# 需要导入模块: import _cffi_backend [as 别名]
# 或者: from _cffi_backend import load_library [as 别名]
def _load_backend_lib(backend, name, flags):
import os
if not isinstance(name, basestring):
if sys.platform != "win32" or name is not None:
return backend.load_library(name, flags)
name = "c" # Windows: load_library(None) fails, but this works
# on Python 2 (backward compatibility hack only)
first_error = None
if '.' in name or '/' in name or os.sep in name:
try:
return backend.load_library(name, flags)
except OSError as e:
first_error = e
import ctypes.util
path = ctypes.util.find_library(name)
if path is None:
if name == "c" and sys.platform == "win32" and sys.version_info >= (3,):
raise OSError("dlopen(None) cannot work on Windows for Python 3 "
"(see http://bugs.python.org/issue23606)")
msg = ("ctypes.util.find_library() did not manage "
"to locate a library called %r" % (name,))
if first_error is not None:
msg = "%s. Additionally, %s" % (first_error, msg)
raise OSError(msg)
return backend.load_library(path, flags)
示例4: verify
# 需要导入模块: import _cffi_backend [as 别名]
# 或者: from _cffi_backend import load_library [as 别名]
def verify(self, source='', tmpdir=None, **kwargs):
"""Verify that the current ffi signatures compile on this
machine, and return a dynamic library object. The dynamic
library can be used to call functions and access global
variables declared in this 'ffi'. The library is compiled
by the C compiler: it gives you C-level API compatibility
(including calling macros). This is unlike 'ffi.dlopen()',
which requires binary compatibility in the signatures.
"""
from .verifier import Verifier, _caller_dir_pycache
#
# If set_unicode(True) was called, insert the UNICODE and
# _UNICODE macro declarations
if self._windows_unicode:
self._apply_windows_unicode(kwargs)
#
# Set the tmpdir here, and not in Verifier.__init__: it picks
# up the caller's directory, which we want to be the caller of
# ffi.verify(), as opposed to the caller of Veritier().
tmpdir = tmpdir or _caller_dir_pycache()
#
# Make a Verifier() and use it to load the library.
self.verifier = Verifier(self, source, tmpdir, **kwargs)
lib = self.verifier.load_library()
#
# Save the loaded library for keep-alive purposes, even
# if the caller doesn't keep it alive itself (it should).
self._libraries.append(lib)
return lib