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Directory :  /srv/modoboa/env/lib64/python3.5/site-packages/gevent/libuv/

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Current File : /srv/modoboa/env/lib64/python3.5/site-packages/gevent/libuv//_corecffi_source.c
#include <string.h>
#include "uv.h"

typedef void* GeventWatcherObject;

static int python_callback(GeventWatcherObject handle, int revents);
static void python_queue_callback(uv_handle_t* watcher_ptr, int revents);
static void python_handle_error(GeventWatcherObject handle, int revents);
static void python_stop(GeventWatcherObject handle);

static void _gevent_noop(void* handle) {}

static void (*gevent_noop)(void* handle) = &_gevent_noop;

static void _gevent_generic_callback1_unused(uv_handle_t* watcher, int arg)
{
    // Python code may set this to NULL or even change it
    // out from under us, which would tend to break things.
    GeventWatcherObject handle = watcher->data;
    const int cb_result = python_callback(handle, arg);
    switch(cb_result) {
        case -1:
            // in case of exception, call self.loop.handle_error;
            // this function is also responsible for stopping the watcher
            // and allowing memory to be freed
            python_handle_error(handle, arg);
        break;
        case 1:
            // Code to stop the event IF NEEDED. Note that if python_callback
            // has disposed of the last reference to the handle,
            // `watcher` could now be invalid/disposed memory!
            if (!uv_is_active(watcher)) {
                if (watcher->data != handle) {
                    if (watcher->data) {
                        // If Python set the data to NULL, then they
                        // expected to be stopped. That's fine.
                        // Otherwise, something weird happened.
                        fprintf(stderr,
                                "WARNING: gevent: watcher handle changed in callback "
                                "from %p to %p for watcher at %p of type %d\n",
                                handle, watcher->data, watcher, watcher->type);
                        // There's a very good chance that the object the
                        // handle referred to has been changed and/or the
                        // old handle has been deallocated (most common), so
                        // passing the old handle will crash. Instead we
                        // pass a sigil to let python distinguish this case.
                        python_stop(NULL);
                    }
                }
                else {
                    python_stop(handle);
                }
            }
        break;
        case 2:
            // watcher is already stopped and dead, nothing to do.
        break;
        default:
            fprintf(stderr,
                    "WARNING: gevent: Unexpected return value %d from Python callback "
                    "for watcher %p (of type %d) and handle %p\n",
                    cb_result,
                    watcher, watcher->type, handle);
            // XXX: Possible leaking of resources here? Should we be
            // closing the watcher?
    }
}


static void _gevent_generic_callback1(uv_handle_t* watcher, int arg)
{
	python_queue_callback(watcher, arg);
}

static void _gevent_generic_callback0(uv_handle_t* handle)
{
    _gevent_generic_callback1(handle, 0);
}

static void _gevent_async_callback0(uv_async_t* handle)
{
    _gevent_generic_callback0((uv_handle_t*)handle);
}

static void _gevent_timer_callback0(uv_timer_t* handle)
{
    _gevent_generic_callback0((uv_handle_t*)handle);
}

static void _gevent_prepare_callback0(uv_prepare_t* handle)
{
    _gevent_generic_callback0((uv_handle_t*)handle);
}

static void _gevent_check_callback0(uv_check_t* handle)
{
    _gevent_generic_callback0((uv_handle_t*)handle);
}

static void _gevent_idle_callback0(uv_idle_t* handle)
{
    _gevent_generic_callback0((uv_handle_t*)handle);
}

static void _gevent_signal_callback1(uv_signal_t* handle, int signum)
{
    _gevent_generic_callback1((uv_handle_t*)handle, signum);
}


static void _gevent_poll_callback2(void* handle, int status, int events)
{
    _gevent_generic_callback1(handle, status < 0 ? status : events);
}

static void _gevent_fs_event_callback3(void* handle, const char* filename, int events, int status)
{
    _gevent_generic_callback1(handle, status < 0 ? status : events);
}


typedef struct _gevent_fs_poll_s {
    uv_fs_poll_t handle;
    uv_stat_t curr;
    uv_stat_t prev;
} gevent_fs_poll_t;

static void _gevent_fs_poll_callback3(void* handlep, int status, const uv_stat_t* prev, const uv_stat_t* curr)
{
    // stat pointers are valid for this callback only.
    // if given, copy them into our structure, where they can be reached
    // from python, just like libev's watcher does, before calling
    // the callback.

    // The callback is invoked with status < 0 if path does not exist
    // or is inaccessible. The watcher is not stopped but your
    // callback is not called again until something changes (e.g. when
    // the file is created or the error reason changes).
    // In that case the fields will be 0 in curr/prev.


    gevent_fs_poll_t* handle = (gevent_fs_poll_t*)handlep;
    assert(status == 0);

    handle->curr = *curr;
    handle->prev = *prev;

    _gevent_generic_callback1((uv_handle_t*)handle, 0);
}

static void gevent_uv_walk_callback_close(uv_handle_t* handle, void* arg)
{
	if( handle && !uv_is_closing(handle) ) {
		uv_close(handle, NULL);
	}
}

static void gevent_close_all_handles(uv_loop_t* loop)
{
	uv_walk(loop, gevent_uv_walk_callback_close, NULL);
}

static void gevent_zero_timer(uv_timer_t* handle)
{
	memset(handle, 0, sizeof(uv_timer_t));
}

static void gevent_zero_check(uv_check_t* handle)
{
	memset(handle, 0, sizeof(uv_check_t));
}

static void gevent_zero_prepare(uv_prepare_t* handle)
{
	memset(handle, 0, sizeof(uv_prepare_t));
}

static void gevent_zero_loop(uv_loop_t* handle)
{
	memset(handle, 0, sizeof(uv_loop_t));
}

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