1. 20 Feb, 2020 1 commit
  2. 17 Feb, 2020 1 commit
    • Kirill Smelkov's avatar
      sync += RWMutex · 1ad3c2d5
      Kirill Smelkov authored
      Provide sync.RWMutex that can be useful for cases when there are
      multiple simultaneous readers and more seldom writer(s).
      This implements readers-writer mutex with preference for writers
      similarly to Go version.
  3. 13 Jan, 2020 1 commit
  4. 22 Nov, 2019 1 commit
    • Kirill Smelkov's avatar
      sync: Move/Port sync.WorkGroup to C++/Pyx nogil · 33cf3113
      Kirill Smelkov authored
      Provide sync.WorkGroup that can be used directly from C++ and Pyx/nogil codes.
      Python-level sync.WorkGroup becomes a wrapper around pyx/nogil one.
      Like with context (2a359791 "context: Move/Port context package to
      C++/Pyx nogil"), timers (b073f6df "time: Move/Port timers to C++/Pyx
      nogil") and interfaces (5a99b769 "libgolang: Start providing
      interfaces") memory for on-heap allocated WorkGroup is managed
      Python-level tests should be enough to cover C++/Pyx functionality at
      zero-level approximation.
  5. 20 Nov, 2019 1 commit
  6. 14 Nov, 2019 1 commit
  7. 07 Nov, 2019 2 commits
  8. 30 Oct, 2019 1 commit
    • Kirill Smelkov's avatar
      sync: Move/Port WaitGroup to C++/Pyx nogil · b316e504
      Kirill Smelkov authored
      Provide sync.WaitGroup that can be used directly from C++ and Pyx/nogil codes.
      Python-level sync.WaitGroup becomes small wrapper around pyx/nogil one.
      Python-level tests should be enough to cover C++/Pyx functionality at
      zero-level approximation.
  9. 24 Oct, 2019 1 commit
  10. 04 Oct, 2019 1 commit
    • Kirill Smelkov's avatar
      golang: Expose Sema and Mutex as public Python and Cython/nogil API · 34b7a1f4
      Kirill Smelkov authored
      Until now libgolang had semaphore and mutex functionality, but
      implemented only internally and not exposed to users. Since for its
      pinner thread wendelin.core v2 needs not only nogil channels, but also
      nogil mutexes, timers and so on, it is now time to start providing that.
      We start with mutexes:
      - Expose Mutex from insides of libgolang.cpp to public API in
        libgolang.h . We actually expose both Mutex and Sema because
        semaphores are sometimes also useful for low-level synchronization,
        and because it is easier to export Mutex and Sema both at the same time.
      - Provide pyx/nogil API to those as sync.Mutex and sync.Sema.
      - Provide corresponding python wrappers.
      - Add Pyx-level test for semaphore wakeup when wakeup is done not by the
        same thread which did the original acquire. This is the test that was
        promised in 5142460d (libgolang/thread: Add links to upstream
        PyThread_release_lock bug), and it used to corrupt memory and deadlock
        on macOS due to CPython & PyPy runtime bugs:
            -> https://github.com/python/cpython/pull/16047
      Note about python wrappers: At present, due to
      https://github.com/cython/cython/issues/3165, C-level panic is not
      properly translated into Py-level exception in (Py)Sema/Mutex constructors.
      This should not pose a real problem in practice though.
  11. 29 Aug, 2019 3 commits
    • Kirill Smelkov's avatar
      pyx api: Provide sleep · ce8152a2
      Kirill Smelkov authored
      - Add sleep functionality to libgolang runtime;
      - Implement sleep for thread and gevent runtimes. Thread runtime
        implements sleep independently of GIL, but only for POSIX for now;
      - Switch golang.time py module into using golang.time pyx module.
      As we are adding sleep, related functionality to query system about
      "what is current time?" is also added.
    • Kirill Smelkov's avatar
      libgolang: Introduce runtimes · ad00be70
      Kirill Smelkov authored
      Libgolang will be generic library and it will adapt itself to particular
      execution environment by way of runtime plugin. This commit introduces
      stubs for two such runtimes - "thread" and "gevent" - and initializes
      libgolang with particular runtime depending on whether golang is
      imported with gevent preactivated or not.
      The runtimes themselves are empty at this step. We'll be adding runtime
      functionality in the following patches.
    • Kirill Smelkov's avatar
      Start using Cython and providing Cython/nogil API · 8fa3c15b
      Kirill Smelkov authored
      Start transforming Pygolang from being pure Python project into project
      that uses both Python and Cython and provides both Python and Cython API
      to its users.
      For Cython API there is a goal for it to be usable independently of
      Python GIL - i.e. independently of Python runtime and limitations
      imposed by Python's global interpreter lock. The motivation for this
      work is wendelin.core v2, which, due to its design, would deadlock if it
      tries to take the GIL in its pinner thread.
      This commit brings bare minimum establishing libraries and build system.
      - Introduces C/C++ library libgolang. Libgolang will be serving most of
        nogil functionality and Pyx API will be a small wrapper over it. At
        this step Libgolang comes only with C-level panic;
      - Introduces Pyx package golang that is aliased to Pyx package
        golang._golang . Users can do `from golang cimport ...` similarly to how
        they do py-level `from golang import ...`. At this step golang.pyx
        only wraps panic and provides way to transform C-level panic into Python
      - Introduces Py package golang.pyx.build . This package, similarly to
        golang.org/pkg/go/build, serves as the system to build Pyx packages -
        both external packages that use Pygolang in pyx mode, and to build
        Pygolang itself. The build, internally, is served by setuptools_dso
        and cython. An example how to use golang.pyx.build from external
        project comes in golang/pyx/testprog/golang_pyx_user/ and is used by
        tests to verify golang.pyx.build functionality;
      - Introduces Pygolang build dependency to cython and setuptools_dso.
  12. 14 May, 2019 1 commit
    • Kirill Smelkov's avatar
      *: __future__ += absolute_imports; Use unified __future__ everywhere · 81dfefa0
      Kirill Smelkov authored
      - we are going to introduce golang.time, and from inside there without
        `from __future__ import absolute_imports` it won't be possible to import
        needed stdlib's time.
      - we were already doing `from __future__ import print_function`, but
        only in some files.
      -> It makes sense to apply updated __future__ usage uniformly.
  13. 02 Jul, 2018 1 commit