Refactoring and initial work on multiprocessing support

structio/__init__.py

@@ -6,11 +6,11 @@ from structio.core.managers.signals.sigint import SigIntManager
 from structio.core.time.clock import DefaultClock
 from structio.core.syscalls import sleep, suspend as _suspend
 from structio.core.context import TaskPool, TaskScope
-from structio.core.exceptions import Cancelled, TimedOut, ResourceClosed
+from structio.exceptions import Cancelled, TimedOut, ResourceClosed
 from structio.core import task
 from structio.core.task import Task, TaskState
 from structio.sync import Event, Queue, MemoryChannel, Semaphore, Lock, RLock
-from structio.core.abc import Channel, Stream, ChannelReader, ChannelWriter
+from structio.abc import Channel, Stream, ChannelReader, ChannelWriter
 from structio import thread
 from structio.io.files import open_file, wrap_file, aprint, stdout, stderr, stdin, ainput
 

structio/abc.py

@@ -1,6 +1,6 @@
 from abc import abstractmethod, ABC
 from structio.core.task import Task
-from structio.core.exceptions import StructIOException
+from structio.exceptions import StructIOException
 from typing import Callable, Any, Coroutine
 from types import FrameType
 

structio/core/context.py

@@ -3,7 +3,7 @@ from structio.core.run import current_loop
 from structio.core.task import Task
 from structio.core.syscalls import suspend, checkpoint
 from typing import Callable, Coroutine, Any
-from structio.core.exceptions import Cancelled, StructIOException
+from structio.exceptions import Cancelled, StructIOException
 
 
 class TaskScope:

structio/core/kernels/fifo.py

@@ -1,12 +1,12 @@
 import traceback
 import warnings
 from types import FrameType
-from structio.core.abc import BaseKernel, BaseClock, BaseDebugger, BaseIOManager, SignalManager
+from structio.abc import BaseKernel, BaseClock, BaseDebugger, BaseIOManager, SignalManager
 from structio.core.context import TaskPool, TaskScope
 from structio.core.task import Task, TaskState
 from structio.util.ki import CTRLC_PROTECTION_ENABLED
 from structio.core.time.queue import TimeQueue
-from structio.core.exceptions import StructIOException, Cancelled, TimedOut
+from structio.exceptions import StructIOException, Cancelled, TimedOut
 from collections import deque
 from typing import Callable, Coroutine, Any
 from functools import partial

structio/core/managers/io/simple.py

@@ -1,8 +1,7 @@
 from collections import defaultdict
-from structio.core.abc import BaseIOManager, AsyncResource, BaseKernel
+from structio.abc import BaseIOManager, AsyncResource, BaseKernel
 from structio.core.context import Task
 from structio.core.run import current_loop, current_task
-import socket
 import select
 
 

structio/core/managers/signals/sigint.py

@@ -1,4 +1,4 @@
-from structio.core.abc import SignalManager
+from structio.abc import SignalManager
 from types import FrameType
 from structio.util.ki import currently_protected
 from structio.core.run import current_loop

structio/core/run.py

@@ -1,8 +1,8 @@
 import inspect
 import functools
 from threading import local
-from structio.core.abc import BaseKernel, BaseDebugger, BaseClock, SignalManager, BaseIOManager
-from structio.core.exceptions import StructIOException
+from structio.abc import BaseKernel, BaseDebugger, BaseClock, SignalManager, BaseIOManager
+from structio.exceptions import StructIOException
 from structio.core.task import Task
 from typing import Callable, Any, Coroutine
 

structio/core/time/clock.py

@@ -1,6 +1,6 @@
 import random
 from timeit import default_timer
-from structio.core.abc import BaseClock
+from structio.abc import BaseClock
 
 
 class DefaultClock(BaseClock):

structio/core/time/queue.py

@@ -1,6 +1,6 @@
 from typing import Any
 from structio.core.task import Task, TaskState
-from structio.core.abc import BaseClock
+from structio.abc import BaseClock
 from heapq import heappush, heappop, heapify
 
 

structio/core/tooling.py

@@ -1,4 +1,4 @@
-from structio.core.abc import BaseDebugger
+from structio.abc import BaseDebugger
 
 
 class SimpleDebugger(BaseDebugger):

structio/io/files.py

@@ -2,7 +2,7 @@ import io
 import sys
 import structio
 from functools import partial
-from structio.core.abc import AsyncResource
+from structio.abc import AsyncResource
 from structio.core.syscalls import check_cancelled
 
 # Stolen from Trio

structio/parallel.py

@@ -0,0 +1,21 @@
+# Module inspired by subprocess which allows for asynchronous
+# multiprocessing
+from dataclasses import dataclass, field
+from structio.abc import StreamWriter, StreamReader
+
+
+@dataclass
+class Process:
+    """
+    An asynchronous process
+    """
+
+    args: str | list
+    pid: int
+    stdin: StreamWriter | None = field(default=None)
+    stdout: StreamReader | None = field(default=None)
+    stderr: StreamReader | None = field(default=None)
+    returncode: int | None = field(default=None)
+
+
+

structio/sync.py

@@ -1,8 +1,8 @@
 # Task synchronization primitives
 from structio.core.syscalls import suspend, checkpoint
-from structio.core.exceptions import ResourceClosed
+from structio.exceptions import ResourceClosed
 from structio.core.run import current_task, current_loop
-from structio.core.abc import ChannelReader, ChannelWriter, Channel
+from structio.abc import ChannelReader, ChannelWriter, Channel
 from structio.util.ki import enable_ki_protection
 from structio.core.task import Task
 from collections import deque

structio/thread.py

@@ -8,11 +8,10 @@ import structio
 from structio.sync import Event, Semaphore, Queue
 from structio.util.ki import enable_ki_protection
 from structio.core.syscalls import checkpoint
-from structio.core.abc import BaseKernel
+from structio.abc import BaseKernel
 from structio.core.run import current_loop
 from typing import Callable, Any, Coroutine
-from structio.core.exceptions import StructIOException, TimedOut, Cancelled
-
+from structio.exceptions import StructIOException
 
 _storage = threading.local()
 # Max number of concurrent threads that can