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//
// Copyright 2012 Francisco Jerez
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the "Software"),
// to deal in the Software without restriction, including without limitation
// the rights to use, copy, modify, merge, publish, distribute, sublicense,
// and/or sell copies of the Software, and to permit persons to whom the
// Software is furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
// THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
// WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
// OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.
//
#ifndef __CORE_EVENT_HPP__
#define __CORE_EVENT_HPP__
#include <functional>
#include "core/base.hpp"
#include "core/queue.hpp"
namespace clover {
typedef struct _cl_event event;
}
///
/// Class that represents a task that might be executed asynchronously
/// at some point in the future.
///
/// An event consists of a list of dependencies, a boolean signalled()
/// flag, and an associated task. An event is considered signalled as
/// soon as all its dependencies (if any) are signalled as well, and
/// the trigger() method is called; at that point the associated task
/// will be started through the specified \a action_ok. If the
/// abort() method is called instead, the specified \a action_fail is
/// executed and the associated task will never be started. Dependent
/// events will be aborted recursively.
///
/// The execution status of the associated task can be queried using
/// the status() method, and it can be waited for completion using the
/// wait() method.
///
struct _cl_event : public clover::ref_counter {
public:
typedef std::function<void (clover::event &)> action;
_cl_event(clover::context &ctx, std::vector<clover::event *> deps,
action action_ok, action action_fail);
virtual ~_cl_event();
void trigger();
void abort(cl_int status);
bool signalled() const;
virtual cl_int status() const = 0;
virtual cl_command_queue queue() const = 0;
virtual cl_command_type command() const = 0;
virtual void wait() const = 0;
clover::context &ctx;
protected:
void chain(clover::event *ev);
cl_int __status;
std::vector<clover::ref_ptr<clover::event>> deps;
private:
unsigned wait_count;
action action_ok;
action action_fail;
std::vector<clover::ref_ptr<clover::event>> __chain;
};
namespace clover {
///
/// Class that represents a task executed by a command queue.
///
/// Similar to a normal clover::event. In addition it's associated
/// with a given command queue \a q and a given OpenCL \a command.
/// hard_event instances created for the same queue are implicitly
/// ordered with respect to each other, and they are implicitly
/// triggered on construction.
///
/// A hard_event is considered complete when the associated
/// hardware task finishes execution.
///
class hard_event : public event {
public:
hard_event(clover::command_queue &q, cl_command_type command,
std::vector<clover::event *> deps,
action action = [](event &){});
~hard_event();
virtual cl_int status() const;
virtual cl_command_queue queue() const;
virtual cl_command_type command() const;
virtual void wait() const;
friend class ::_cl_command_queue;
private:
virtual void fence(pipe_fence_handle *fence);
clover::command_queue &__queue;
cl_command_type __command;
pipe_fence_handle *__fence;
};
///
/// Class that represents a software event.
///
/// A soft_event is not associated with any specific hardware task
/// or command queue. It's considered complete as soon as all its
/// dependencies finish execution.
///
class soft_event : public event {
public:
soft_event(clover::context &ctx, std::vector<clover::event *> deps,
bool trigger, action action = [](event &){});
virtual cl_int status() const;
virtual cl_command_queue queue() const;
virtual cl_command_type command() const;
virtual void wait() const;
};
}
#endif
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