def spawn(cls, channel):
pid = pid_t()
file_actions = ctypes.pointer(posix_spawn_file_actions_t())
res = posix_spawn_file_actions_init(file_actions)
check_errno(res)
exe = ctypes.c_char_p(util.str2b(sys.executable))
# Bind
remap = (
(channel.fd, kStartFd),
)
for fromfd, tofd in remap:
res = posix_spawn_file_actions_adddup2(file_actions, fromfd, tofd)
check_errno(res)
envp = (ctypes.c_char_p * (len(os.environ) + 1))()
for index, key in enumerate(os.environ.keys()):
export = key + '=' + os.environ[key]
envp[index] = ctypes.c_char_p(util.str2b(export))
envp[len(os.environ)] = None
# Create argv.
argv = [
sys.executable,
'-c',
'import sys; from ambuild2.ipc.posix_proc import child_main; child_main("{0}")'.format(channel.name)
]
c_argv = (ctypes.c_char_p * (len(argv) + 1))()
for index, arg in enumerate(argv):
c_argv[index] = ctypes.c_char_p(util.str2b(arg))
c_argv[len(argv)] = None
res = posix_spawnp(
ctypes.pointer(pid),
exe,
file_actions,
None,
ctypes.cast(c_argv, ctypes.c_void_p),
ctypes.cast(envp, ctypes.c_void_p)
)
check_errno(res)
posix_spawn_file_actions_destroy(file_actions)
return cls(pid.value)
def spawn(cls, channel):
pid = pid_t()
file_actions = ctypes.pointer(posix_spawn_file_actions_t())
res = posix_spawn_file_actions_init(file_actions)
check_errno(res)
exe = ctypes.c_char_p(util.str2b(sys.executable))
# Bind
remap = (
(channel.fd, kStartFd),
)
for fromfd, tofd in remap:
res = posix_spawn_file_actions_adddup2(file_actions, fromfd, tofd)
check_errno(res)
envp = (ctypes.c_char_p * (len(os.environ) + 1))()
for index, key in enumerate(os.environ.keys()):
export = key + '=' + os.environ[key]
envp[index] = ctypes.c_char_p(util.str2b(export))
envp[len(os.environ)] = None
# Create argv.
argv = [
sys.executable,
'-c',
'import sys; from ambuild2.ipc.posix_proc import child_main; child_main("{0}")'.format(channel.name)
]
c_argv = (ctypes.c_char_p * (len(argv) + 1))()
for index, arg in enumerate(argv):
c_argv[index] = ctypes.c_char_p(util.str2b(arg))
c_argv[len(argv)] = None
res = posix_spawnp(
ctypes.pointer(pid),
exe,
file_actions,
None,
ctypes.cast(c_argv, ctypes.c_void_p),
ctypes.cast(envp, ctypes.c_void_p)
)
check_errno(res)
posix_spawn_file_actions_destroy(file_actions)
return cls(pid.value)
def spawn(cls, channel):
eval = 'from ambuild2.ipc.windows import child_main; child_main()'
argv = [sys.executable, '-c', eval]
argv += ['--name', '{0}'.format(channel.name)]
# This is pretty hacky. Maybe we should just pass in the pipe name instead.
argv += ['--pipe', '{0}'.format(channel.path)]
cmdline = ' '.join(['"{0}"'.format(arg) for arg in argv])
cmdline = util.str2b(cmdline)
cmdline_buffer = ctypes.create_string_buffer(cmdline)
startup_info = StartupInfo()
startup_info.dwFlags |= STARTF_USESTDHANDLES
startup_info.hStdOutput = GetStdHandle(STD_OUTPUT_HANDLE)
startup_info.hStdError = GetStdHandle(STD_ERROR_HANDLE)
startup_info.hStdInput = GetStdHandle(STD_INPUT_HANDLE)
proc_info = ProcessInformation()
executable = sys_executable()
rval = fnCreateProcessA(
util.str2b(executable),
cmdline_buffer,
None,
None,
1, # bInheritHandles
0, # dwCreationFlags
None, # lpEnvironment
None, # lpCurrentDirectory
ctypes.pointer(startup_info),
ctypes.pointer(proc_info)
)
if not rval:
raise WinError()
CloseHandle(proc_info.hThread)
return cls(proc_info.hProcess, proc_info.dwProcessId)
def OpenPipe(path):
rval = fnCreateFileA(
util.str2b(path),
GENERIC_READ | GENERIC_WRITE,
0,
None,
OPEN_EXISTING,
FILE_FLAG_OVERLAPPED,
None
)
if rval == INVALID_HANDLE_VALUE:
raise WinError()
return handle_t(rval)
def spawn(cls, channel):
eval = 'from ambuild2.ipc.windows import child_main; child_main()'
argv = [sys.executable, '-c', eval]
argv += ['--name', '{0}'.format(channel.name)]
# This is pretty hacky. Maybe we should just pass in the pipe name instead.
argv += ['--pipe', '{0}'.format(channel.path)]
cmdline = ' '.join(['"{0}"'.format(arg) for arg in argv])
cmdline = util.str2b(cmdline)
cmdline_buffer = ctypes.create_string_buffer(cmdline)
startup_info = StartupInfo()
startup_info.dwFlags |= STARTF_USESTDHANDLES
startup_info.hStdOutput = GetStdHandle(STD_OUTPUT_HANDLE)
startup_info.hStdError = GetStdHandle(STD_ERROR_HANDLE)
startup_info.hStdInput = GetStdHandle(STD_INPUT_HANDLE)
proc_info = ProcessInformation()
executable = sys_executable()
rval = fnCreateProcessA(
util.str2b(executable),
cmdline_buffer,
None,
None,
1, # bInheritHandles
0, # dwCreationFlags
None, # lpEnvironment
None, # lpCurrentDirectory
ctypes.pointer(startup_info),
ctypes.pointer(proc_info))
if not rval:
raise WinError()
CloseHandle(proc_info.hThread)
return cls(proc_info.hProcess, proc_info.dwProcessId)
def CreateNamedPipe():
global pipe_counter_
pipe_name = r'\\.\pipe\ambuild-{0}-{1}'.format(os.getpid(), pipe_counter_)
pipe_counter_ += 1
flags = PIPE_ACCESS_DUPLEX | FILE_FLAG_OVERLAPPED | FILE_FLAG_FIRST_PIPE_INSTANCE
rval = fnCreateNamedPipeA(util.str2b(pipe_name), flags,
PIPE_TYPE_BYTE | PIPE_TYPE_READMODE_BYTE, 1,
4096, 4096, 5000, None)
if rval == INVALID_HANDLE_VALUE:
raise WinError()
return handle_t(rval), pipe_name
def CreateNamedPipe():
global pipe_counter_
pipe_name = r'\\.\pipe\ambuild-{0}-{1}'.format(os.getpid(), pipe_counter_)
pipe_counter_ += 1
flags = PIPE_ACCESS_DUPLEX | FILE_FLAG_OVERLAPPED | FILE_FLAG_FIRST_PIPE_INSTANCE
rval = fnCreateNamedPipeA(
util.str2b(pipe_name),
flags,
PIPE_TYPE_BYTE | PIPE_TYPE_READMODE_BYTE,
1,
4096,
4096,
5000,
None
)
if rval == INVALID_HANDLE_VALUE:
raise WinError()
return handle_t(rval), pipe_name
def OpenPipe(path):
rval = fnCreateFileA(util.str2b(path), GENERIC_READ | GENERIC_WRITE, 0,
None, OPEN_EXISTING, FILE_FLAG_OVERLAPPED, None)
if rval == INVALID_HANDLE_VALUE:
raise WinError()
return handle_t(rval)
