def test_constant_integer():
value = rffi_platform.getconstantinteger("BLAH", "#define BLAH (6*7)")
assert value == 42
value = rffi_platform.getconstantinteger("BLAH", "#define BLAH (-2147483648LL)")
assert value == -2147483648
value = rffi_platform.getconstantinteger("BLAH", "#define BLAH (3333333333ULL)")
assert value == 3333333333
def test_constant_integer():
value = rffi_platform.getconstantinteger('BLAH', '#define BLAH (6*7)')
assert value == 42
value = rffi_platform.getconstantinteger('BLAH',
'#define BLAH (-2147483648LL)')
assert value == -2147483648
value = rffi_platform.getconstantinteger('BLAH',
'#define BLAH (3333333333ULL)')
assert value == 3333333333
from pypy.rpython.extfunc import register_external
from pypy.rlib.objectmodel import CDefinedIntSymbolic
if sys.platform == 'linux2':
# This only works with linux's madvise(), which is really not a memory
# usage hint but a real command. It guarantees that after MADV_DONTNEED
# the pages are cleared again.
# Note that the trick of the general 'posix' section below, i.e.
# reading /dev/zero, does not seem to have the correct effect of
# lazily-allocating pages on all Linux systems.
from pypy.rpython.tool import rffi_platform
from pypy.translator.tool.cbuild import ExternalCompilationInfo
_eci = ExternalCompilationInfo(includes=['sys/mman.h'])
MADV_DONTNEED = rffi_platform.getconstantinteger('MADV_DONTNEED',
'#include <sys/mman.h>')
linux_madvise = rffi.llexternal('madvise',
[llmemory.Address, rffi.SIZE_T, rffi.INT],
rffi.INT,
sandboxsafe=True, _nowrapper=True,
compilation_info=_eci)
linux_getpagesize = rffi.llexternal('getpagesize', [], rffi.INT,
sandboxsafe=True, _nowrapper=True)
class LinuxPageSize:
def __init__(self):
self.pagesize = 0
_freeze_ = __init__
linuxpagesize = LinuxPageSize()
def clear_large_memory_chunk(baseaddr, size):
from pypy.rpython.extfunc import register_external
from pypy.rlib.objectmodel import CDefinedIntSymbolic
if sys.platform.startswith('linux'):
# This only works with linux's madvise(), which is really not a memory
# usage hint but a real command. It guarantees that after MADV_DONTNEED
# the pages are cleared again.
# Note that the trick of the general 'posix' section below, i.e.
# reading /dev/zero, does not seem to have the correct effect of
# lazily-allocating pages on all Linux systems.
from pypy.rpython.tool import rffi_platform
from pypy.translator.tool.cbuild import ExternalCompilationInfo
_eci = ExternalCompilationInfo(includes=['sys/mman.h'])
MADV_DONTNEED = rffi_platform.getconstantinteger('MADV_DONTNEED',
'#include <sys/mman.h>')
linux_madvise = rffi.llexternal('madvise',
[llmemory.Address, rffi.SIZE_T, rffi.INT],
rffi.INT,
sandboxsafe=True,
_nowrapper=True,
compilation_info=_eci)
linux_getpagesize = rffi.llexternal('getpagesize', [],
rffi.INT,
sandboxsafe=True,
_nowrapper=True)
class LinuxPageSize:
def __init__(self):
self.pagesize = 0
