Mercurial > hg > Members > aka > jupyter_CbC_kernel
annotate jupyter_c_kernel/kernel.py @ 34:b5bc8483ac3e
wip
| author | Brendan Rius <brendan@omixy.com> |
|---|---|
| date | Sat, 30 Apr 2016 21:45:41 +0100 |
| parents | f842dabb75d7 |
| children | e05900c7967e |
| rev | line source |
|---|---|
| 34 | 1 from queue import Queue, Empty |
| 33 | 2 from threading import Thread |
| 3 | |
| 0 | 4 from ipykernel.kernelbase import Kernel |
| 5 import subprocess | |
| 6 import tempfile | |
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7 import os |
| 34 | 8 |
| 9 | |
| 10 class JupyterSubprocess(subprocess.Popen): | |
| 11 def __init__(self, cmd, write_to_stdout, write_to_stderr): | |
| 12 self._write_to_stdout = write_to_stdout | |
| 13 self._write_to_stderr = write_to_stderr | |
| 14 | |
| 15 super().__init__(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE) | |
| 16 | |
| 17 self._stdout_queue = Queue() | |
| 18 self._stdout_thread = Thread(target=JupyterSubprocess._enqueue_output, args=(self.stdout, self._stdout_queue)) | |
| 19 self._stdout_thread.daemon = True | |
| 20 self._stdout_thread.start() | |
| 21 | |
| 22 self._stderr_queue = Queue() | |
| 23 self._stderr_thread = Thread(target=JupyterSubprocess._enqueue_output, args=(self.stderr, self._stderr_queue)) | |
| 24 self._stderr_thread.daemon = True | |
| 25 self._stderr_thread.start() | |
| 26 | |
| 27 @staticmethod | |
| 28 def _enqueue_output(contents, queue): | |
| 29 for line in iter(contents.readline, b''): | |
| 30 queue.put(line) | |
| 31 contents.close() | |
| 32 | |
| 33 def write_contents(self, log): | |
| 34 try: | |
| 35 stdout_contents = self._stdout_queue.get_nowait() | |
| 36 except Empty: | |
| 37 log.error("stdout empty") | |
| 38 else: | |
| 39 log.error("stdout contains: {}".format(stdout_contents)) | |
| 40 self._write_to_stdout(stdout_contents) | |
| 41 try: | |
| 42 stderr_contents = self._stderr_queue.get_nowait() | |
| 43 except Empty: | |
| 44 log.error("stderr empty") | |
| 45 else: | |
| 46 log.error("stderr contains: {}".format(stderr_contents)) | |
| 47 self._write_to_stderr(stderr_contents) | |
| 0 | 48 |
| 49 | |
| 50 class CKernel(Kernel): | |
| 20 | 51 implementation = 'jupyter_c_kernel' |
| 0 | 52 implementation_version = '1.0' |
| 53 language = 'c' | |
| 54 language_version = 'C11' | |
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55 language_info = {'name': 'c', |
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56 'mimetype': 'text/plain', |
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57 'file_extension': 'c'} |
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58 banner = "C kernel.\n" \ |
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59 "Uses gcc, compiles in C11, and creates source code files and executables in temporary folder.\n" |
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60 |
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61 def __init__(self, *args, **kwargs): |
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62 super(CKernel, self).__init__(*args, **kwargs) |
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63 self.files = [] |
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64 |
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65 def cleanup_files(self): |
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66 """Remove all the temporary files created by the kernel""" |
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67 for file in self.files: |
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68 os.remove(file) |
| 0 | 69 |
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70 def new_temp_file(self, **kwargs): |
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71 """Create a new temp file to be deleted when the kernel shuts down""" |
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72 # We don't want the file to be deleted when closed, but only when the kernel stops |
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73 kwargs['delete'] = False |
| 9 | 74 kwargs['mode'] = 'w' |
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75 file = tempfile.NamedTemporaryFile(**kwargs) |
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76 self.files.append(file.name) |
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77 return file |
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78 |
| 34 | 79 def _write_to_stdout(self, contents): |
| 80 self.send_response(self.iopub_socket, 'stream', {'name': 'stdout', 'text': contents}) | |
| 33 | 81 |
| 34 | 82 def _write_to_stderr(self, contents): |
| 83 self.send_response(self.iopub_socket, 'stream', {'name': 'stderr', 'text': contents}) | |
| 33 | 84 |
| 34 | 85 def create_jupyter_subprocess(self, cmd): |
| 86 return JupyterSubprocess(cmd, | |
| 87 lambda contents: self._write_to_stdout(contents.decode()), | |
| 88 lambda contents: self._write_to_stderr(contents.decode())) | |
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89 |
| 34 | 90 def compile_with_gcc(self, source_filename, binary_filename): |
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91 args = ['gcc', source_filename, '-std=c11', '-o', binary_filename] |
| 34 | 92 return self.create_jupyter_subprocess(args) |
| 0 | 93 |
| 94 def do_execute(self, code, silent, store_history=True, | |
| 95 user_expressions=None, allow_stdin=False): | |
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96 with self.new_temp_file(suffix='.c') as source_file: |
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97 source_file.write(code) |
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98 source_file.flush() |
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parents:
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99 with self.new_temp_file(suffix='.out') as binary_file: |
| 34 | 100 p = self.compile_with_gcc(source_file.name, binary_file.name) |
| 33 | 101 while p.poll() is None: |
| 34 | 102 p.write_contents(self.log) |
| 103 p.write_contents(self.log) | |
| 33 | 104 if p.returncode != 0: # Compilation failed |
| 34 | 105 self._write_to_stderr( |
| 106 "[C kernel] GCC exited with code {}, the executable will not be executed".format( | |
| 107 p.returncode)) | |
| 33 | 108 return {'status': 'ok', 'execution_count': self.execution_count, 'payload': [], |
| 109 'user_expressions': {}} | |
| 0 | 110 |
| 34 | 111 p = self.create_jupyter_subprocess([binary_file.name]) |
| 33 | 112 while p.poll() is None: |
| 34 | 113 p.write_contents(self.log) |
| 114 p.write_contents(self.log) | |
| 33 | 115 |
| 116 if p.returncode != 0: | |
| 34 | 117 self._write_to_stderr("[C kernel] Executable exited with code {}".format(p.returncode)) |
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118 return {'status': 'ok', 'execution_count': self.execution_count, 'payload': [], 'user_expressions': {}} |
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parents:
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119 |
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120 def do_shutdown(self, restart): |
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aa54c85303b6
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parents:
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121 """Cleanup the created source code files and executables when shutting down the kernel""" |
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parents:
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122 self.cleanup_files() |