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)
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)
def main():
import os
try:
import _cffi_backend
except ImportError:
sys.stderr.write('SKIP: cannot import _cffi_backend\n')
return 0
libc = _cffi_backend.load_library(None)
BInt = _cffi_backend.new_primitive_type("int")
BSizeT = _cffi_backend.new_primitive_type("size_t")
BChar = _cffi_backend.new_primitive_type("char")
BCharP = _cffi_backend.new_pointer_type(BChar)
BWrite = _cffi_backend.new_function_type([BInt, BCharP, BSizeT],
BSizeT) # not signed here!
_write = libc.load_function(BWrite, 'write')
i = 0
fd0, fd1 = os.pipe()
buffer = _cffi_backend.newp(BCharP, 'A')
while i < 300:
tmp = _write(fd1, buffer, 1) # ID: cfficall
assert tmp == 1
assert os.read(fd0, 2) == 'A'
i += 1
os.close(fd0)
os.close(fd1)
return 42
def main():
import os
try:
import _cffi_backend
except ImportError:
sys.stderr.write('SKIP: cannot import _cffi_backend\n')
return 0
libc = _cffi_backend.load_library(None)
BInt = _cffi_backend.new_primitive_type("int")
BSizeT = _cffi_backend.new_primitive_type("size_t")
BChar = _cffi_backend.new_primitive_type("char")
BCharP = _cffi_backend.new_pointer_type(BChar)
BWrite = _cffi_backend.new_function_type(
[BInt, BCharP, BSizeT], BSizeT) # not signed here!
_write = libc.load_function(BWrite, 'write')
i = 0
fd0, fd1 = os.pipe()
buffer = _cffi_backend.newp(BCharP, 'A')
while i < 300:
tmp = _write(fd1, buffer, 1) # ID: cfficall
assert tmp == 1
assert os.read(fd0, 2) == 'A'
i += 1
os.close(fd0)
os.close(fd1)
return 42
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)
def find_and_load_library_for_test(name, is_global=False):
if name is None:
path = None
else:
import ctypes.util
path = ctypes.util.find_library(name)
import _cffi_backend
return _cffi_backend.load_library(path, is_global)
def find_and_load_library_for_test(name, is_global=False):
if name is None:
path = None
else:
import ctypes.util
path = ctypes.util.find_library(name)
import _cffi_backend
return _cffi_backend.load_library(path, is_global)
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
# (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:
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)
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
# (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:
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)
def main(libm_name):
try:
import _cffi_backend
except ImportError:
sys.stderr.write('SKIP: cannot import _cffi_backend\n')
return 0
libm = _cffi_backend.load_library(libm_name)
BDouble = _cffi_backend.new_primitive_type("double")
BSin = _cffi_backend.new_function_type([BDouble], BDouble)
sin = libm.load_function(BSin, 'sin')
def f(*args):
for i in range(300):
sin(*args)
f(1.0)
f(1)
def main(libm_name):
try:
import _cffi_backend
except ImportError:
sys.stderr.write('SKIP: cannot import _cffi_backend\n')
return 0
libm = _cffi_backend.load_library(libm_name)
BDouble = _cffi_backend.new_primitive_type("double")
BSin = _cffi_backend.new_function_type([BDouble], BDouble)
sin = libm.load_function(BSin, 'sin')
def f(*args):
for i in range(300):
sin(*args)
f(1.0)
f(1)
def main(libm_name):
try:
import _cffi_backend
except ImportError:
sys.stderr.write('SKIP: cannot import _cffi_backend\n')
return 0
libm = _cffi_backend.load_library(libm_name)
BDouble = _cffi_backend.new_primitive_type("double")
BInt = _cffi_backend.new_primitive_type("int")
BPow = _cffi_backend.new_function_type([BDouble, BInt], BDouble)
ldexp = libm.load_function(BPow, 'ldexp')
i = 0
res = 0
while i < 300:
tmp = ldexp(1, 3) # ID: cfficall
res += tmp
i += 1
BLong = _cffi_backend.new_primitive_type("long")
ldexp_addr = int(_cffi_backend.cast(BLong, ldexp))
return ldexp_addr, res
def main(libm_name):
try:
import _cffi_backend
except ImportError:
sys.stderr.write('SKIP: cannot import _cffi_backend\n')
return 0
libm = _cffi_backend.load_library(libm_name)
BDouble = _cffi_backend.new_primitive_type("double")
BInt = _cffi_backend.new_primitive_type("int")
BPow = _cffi_backend.new_function_type([BDouble, BInt], BDouble)
ldexp = libm.load_function(BPow, 'ldexp')
i = 0
res = 0
while i < 300:
tmp = ldexp(1, 3) # ID: cfficall
res += tmp
i += 1
BLong = _cffi_backend.new_primitive_type("long")
ldexp_addr = int(_cffi_backend.cast(BLong, ldexp))
return ldexp_addr, res
def main():
import os
try:
import _cffi_backend
except ImportError:
sys.stderr.write('SKIP: cannot import _cffi_backend\n')
return 0
libc = _cffi_backend.load_library(None)
BInt = _cffi_backend.new_primitive_type("int")
BClose = _cffi_backend.new_function_type([BInt], BInt)
_dup = libc.load_function(BClose, 'dup')
i = 0
fd0, fd1 = os.pipe()
while i < 300:
tmp = _dup(fd0) # ID: cfficall
os.close(tmp)
i += 1
os.close(fd0)
os.close(fd1)
BLong = _cffi_backend.new_primitive_type("long")
return 42
def main():
import os
try:
import _cffi_backend
except ImportError:
sys.stderr.write('SKIP: cannot import _cffi_backend\n')
return 0
libc = _cffi_backend.load_library(None)
BInt = _cffi_backend.new_primitive_type("int")
BClose = _cffi_backend.new_function_type([BInt], BInt)
_dup = libc.load_function(BClose, 'dup')
i = 0
fd0, fd1 = os.pipe()
while i < 300:
tmp = _dup(fd0) # ID: cfficall
os.close(tmp)
i += 1
os.close(fd0)
os.close(fd1)
BLong = _cffi_backend.new_primitive_type("long")
return 42
def _make_ffi_library(ffi, libname, flags):
import os
name = libname
if name is None:
name = 'c' # on Posix only
backend = ffi._backend
try:
if '.' not in name and '/' not in name:
raise OSError
backendlib = backend.load_library(name, flags)
except OSError:
import ctypes.util
path = ctypes.util.find_library(name)
if path is None:
raise OSError("library not found: %r" % (name,))
backendlib = backend.load_library(path, flags)
copied_enums = []
#
def make_accessor(name):
key = 'function ' + name
if key in ffi._parser._declarations:
tp = ffi._parser._declarations[key]
BType = ffi._get_cached_btype(tp)
try:
value = backendlib.load_function(BType, name)
except KeyError:
raise AttributeError(name)
library.__dict__[name] = value
return
#
key = 'variable ' + name
if key in ffi._parser._declarations:
tp = ffi._parser._declarations[key]
BType = ffi._get_cached_btype(tp)
read_variable = backendlib.read_variable
write_variable = backendlib.write_variable
setattr(FFILibrary, name, property(
lambda self: read_variable(BType, name),
lambda self, value: write_variable(BType, name, value)))
return
#
if not copied_enums:
from . import model
for key, tp in ffi._parser._declarations.items():
if not isinstance(tp, model.EnumType):
continue
for enumname, enumval in zip(tp.enumerators, tp.enumvalues):
if enumname not in library.__dict__:
library.__dict__[enumname] = enumval
copied_enums.append(True)
#
if name in library.__dict__: # copied from an enum value just above,
return # or multithread's race condition
raise AttributeError(name)
#
class FFILibrary(object):
def __getattr__(self, name):
make_accessor(name)
return getattr(self, name)
def __setattr__(self, name, value):
try:
property = getattr(self.__class__, name)
except AttributeError:
make_accessor(name)
setattr(self, name, value)
else:
property.__set__(self, value)
#
if libname is not None:
try:
if not isinstance(libname, str): # unicode, on Python 2
libname = libname.encode('utf-8')
FFILibrary.__name__ = 'FFILibrary_%s' % libname
except UnicodeError:
pass
library = FFILibrary()
return library, library.__dict__
def _make_ffi_library(ffi, libname, flags):
import os
name = libname
if name is None:
name = 'c' # on Posix only
backend = ffi._backend
try:
if '.' not in name and '/' not in name:
raise OSError("library not found: %r" % (name, ))
backendlib = 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
backendlib = backend.load_library(path, flags)
copied_enums = []
#
def make_accessor_locked(name):
key = 'function ' + name
if key in ffi._parser._declarations:
tp = ffi._parser._declarations[key]
BType = ffi._get_cached_btype(tp)
try:
value = backendlib.load_function(BType, name)
except KeyError as e:
raise AttributeError('%s: %s' % (name, e))
library.__dict__[name] = value
return
#
key = 'variable ' + name
if key in ffi._parser._declarations:
tp = ffi._parser._declarations[key]
BType = ffi._get_cached_btype(tp)
read_variable = backendlib.read_variable
write_variable = backendlib.write_variable
setattr(
FFILibrary, name,
property(
lambda self: read_variable(BType, name),
lambda self, value: write_variable(BType, name, value)))
return
#
if not copied_enums:
from . import model
for key, tp in ffi._parser._declarations.items():
if not isinstance(tp, model.EnumType):
continue
for enumname, enumval in zip(tp.enumerators, tp.enumvalues):
if enumname not in library.__dict__:
library.__dict__[enumname] = enumval
copied_enums.append(True)
if name in library.__dict__:
return
#
raise AttributeError(name)
#
def make_accessor(name):
with ffi._lock:
if name in library.__dict__ or name in FFILibrary.__dict__:
return # added by another thread while waiting for the lock
make_accessor_locked(name)
#
class FFILibrary(object):
def __getattr__(self, name):
make_accessor(name)
return getattr(self, name)
def __setattr__(self, name, value):
try:
property = getattr(self.__class__, name)
except AttributeError:
make_accessor(name)
setattr(self, name, value)
else:
property.__set__(self, value)
#
if libname is not None:
try:
if not isinstance(libname, str): # unicode, on Python 2
libname = libname.encode('utf-8')
FFILibrary.__name__ = 'FFILibrary_%s' % libname
except UnicodeError:
pass
library = FFILibrary()
return library, library.__dict__
