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import sys
from rpython.rtyper.lltypesystem import lltype, rffi
from rpython.translator.tool.cbuild import ExternalCompilationInfo
from rpython.jit.backend.llsupport.symbolic import WORD
if sys.byteorder == 'little' or sys.maxint <= 2**32:
long2int = int2long = lambda x: x
else:
def long2int(x): return x >> 32
def int2long(x): return x << 32
def get_debug_saved_errno(cpu):
return long2int(cpu._debug_errno_container[3])
def set_debug_saved_errno(cpu, nerrno):
assert nerrno >= 0
cpu._debug_errno_container[3] = int2long(nerrno)
def get_rpy_errno_offset(cpu):
if cpu.translate_support_code:
from rpython.rlib import rthread
return rthread.tlfield_rpy_errno.getoffset()
else:
return 3 * WORD
def get_debug_saved_alterrno(cpu):
return long2int(cpu._debug_errno_container[4])
def set_debug_saved_alterrno(cpu, nerrno):
assert nerrno >= 0
cpu._debug_errno_container[4] = int2long(nerrno)
def get_alt_errno_offset(cpu):
if cpu.translate_support_code:
from rpython.rlib import rthread
return rthread.tlfield_alt_errno.getoffset()
else:
return 4 * WORD
def get_debug_saved_lasterror(cpu):
return cpu._debug_errno_container[5]
def set_debug_saved_lasterror(cpu, nerrno):
assert nerrno >= 0
cpu._debug_errno_container[5] = nerrno
def get_debug_saved_altlasterror(cpu):
return cpu._debug_errno_container[6]
def set_debug_saved_altlasterror(cpu, nerrno):
assert nerrno >= 0
cpu._debug_errno_container[6] = nerrno
def get_rpy_lasterror_offset(cpu):
if cpu.translate_support_code:
from rpython.rlib import rthread
return rthread.tlfield_rpy_lasterror.getoffset()
else:
return 5 * WORD
def get_alt_lasterror_offset(cpu):
if cpu.translate_support_code:
from rpython.rlib import rthread
return rthread.tlfield_alt_lasterror.getoffset()
else:
return 6 * WORD
def _fetch_addr_errno():
eci = ExternalCompilationInfo(
separate_module_sources=['''
#include <errno.h>
RPY_EXPORTED long fetch_addr_errno(void) {
return (long)(&errno);
}
'''])
func1_ptr = rffi.llexternal('fetch_addr_errno', [], lltype.Signed,
compilation_info=eci, _nowrapper=True)
return func1_ptr()
def get_p_errno_offset(cpu):
if cpu.translate_support_code:
from rpython.rlib import rthread
return rthread.tlfield_p_errno.getoffset()
else:
# fetch the real address of errno (in this thread), and store it
# at offset 2 in the _debug_errno_container
if cpu._debug_errno_container[2] == 0:
addr_errno = _fetch_addr_errno()
assert addr_errno != 0
cpu._debug_errno_container[2] = addr_errno
return 2 * WORD
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