cef/include/capi/cef_thread_capi.h

// Copyright (c) 2024 Marshall A. Greenblatt. All rights reserved.
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#ifndef CEF_INCLUDE_CAPI_CEF_THREAD_CAPI_H_
#define CEF_INCLUDE_CAPI_CEF_THREAD_CAPI_H_
#pragma once

#include "include/capi/cef_task_capi.h"
#include "include/internal/cef_thread_internal.h"

#ifdef __cplusplus
extern "C" {
#endif

///
/// A simple thread abstraction that establishes a message loop on a new thread.
/// The consumer uses cef_task_runner_t to execute code on the thread's message
/// loop. The thread is terminated when the cef_thread_t object is destroyed or
/// stop() is called. All pending tasks queued on the thread's message loop will
/// run to completion before the thread is terminated. cef_thread_create() can
/// be called on any valid CEF thread in either the browser or render process.
/// This structure should only be used for tasks that require a dedicated
/// thread. In most cases you can post tasks to an existing CEF thread instead
/// of creating a new one; see cef_task.h for details.
///
typedef struct _cef_thread_t {
  ///
  /// Base structure.
  ///
  cef_base_ref_counted_t base;

  ///
  /// Returns the cef_task_runner_t that will execute code on this thread's
  /// message loop. This function is safe to call from any thread.
  ///
  struct _cef_task_runner_t*(CEF_CALLBACK* get_task_runner)(
      struct _cef_thread_t* self);

  ///
  /// Returns the platform thread ID. It will return the same value after stop()
  /// is called. This function is safe to call from any thread.
  ///
  cef_platform_thread_id_t(CEF_CALLBACK* get_platform_thread_id)(
      struct _cef_thread_t* self);

  ///
  /// Stop and join the thread. This function must be called from the same
  /// thread that called cef_thread_create(). Do not call this function if
  /// cef_thread_create() was called with a |stoppable| value of false (0).
  ///
  void(CEF_CALLBACK* stop)(struct _cef_thread_t* self);

  ///
  /// Returns true (1) if the thread is currently running. This function must be
  /// called from the same thread that called cef_thread_create().
  ///
  int(CEF_CALLBACK* is_running)(struct _cef_thread_t* self);
} cef_thread_t;

///
/// Create and start a new thread. This function does not block waiting for the
/// thread to run initialization. |display_name| is the name that will be used
/// to identify the thread. |priority| is the thread execution priority.
/// |message_loop_type| indicates the set of asynchronous events that the thread
/// can process. If |stoppable| is true (1) the thread will stopped and joined
/// on destruction or when stop() is called; otherwise, the thread cannot be
/// stopped and will be leaked on shutdown. On Windows the |com_init_mode| value
/// specifies how COM will be initialized for the thread. If |com_init_mode| is
/// set to COM_INIT_MODE_STA then |message_loop_type| must be set to ML_TYPE_UI.
///
CEF_EXPORT cef_thread_t* cef_thread_create(
    const cef_string_t* display_name,
    cef_thread_priority_t priority,
    cef_message_loop_type_t message_loop_type,
    int stoppable,
    cef_com_init_mode_t com_init_mode);

#ifdef __cplusplus
}
#endif

#endif  // CEF_INCLUDE_CAPI_CEF_THREAD_CAPI_H_