Improve support for a host owned message pump (issue #1805)

- Add new CefSettings.external_message_pump option and
  CefBrowserProcessHandler::OnScheduleMessagePumpWork() callback.
- Improve documentation related to CefDoMessageLoopWork().
- Pass `--external-message-pump` command-line flag to cefclient or
  cef_unittests to test the new mode.
This commit is contained in:
Marshall Greenblatt
2016-05-04 14:00:03 -04:00
parent 52f9aacdf5
commit 1ff26aa02a
30 changed files with 1084 additions and 20 deletions

View File

@@ -144,11 +144,18 @@ CEF_EXPORT void cef_shutdown();
///
// Perform a single iteration of CEF message loop processing. This function is
// used to integrate the CEF message loop into an existing application message
// loop. Care must be taken to balance performance against excessive CPU usage.
// This function should only be called on the main application thread and only
// if cef_initialize() is called with a CefSettings.multi_threaded_message_loop
// value of false (0). This function will not block.
// provided for cases where the CEF message loop must be integrated into an
// existing application message loop. Use of this function is not recommended
// for most users; use either the cef_run_message_loop() function or
// CefSettings.multi_threaded_message_loop if possible. When using this function
// care must be taken to balance performance against excessive CPU usage. It is
// recommended to enable the CefSettings.external_message_pump option when using
// this function so that
// cef_browser_process_handler_t::on_schedule_message_pump_work() callbacks can
// facilitate the scheduling process. This function should only be called on the
// main application thread and only if cef_initialize() is called with a
// CefSettings.multi_threaded_message_loop value of false (0). This function
// will not block.
///
CEF_EXPORT void cef_do_message_loop_work();

View File

@@ -94,6 +94,22 @@ typedef struct _cef_browser_process_handler_t {
///
struct _cef_print_handler_t* (CEF_CALLBACK *get_print_handler)(
struct _cef_browser_process_handler_t* self);
///
// Called from any thread when work has been scheduled for the browser process
// main (UI) thread. This callback is used in combination with CefSettings.
// external_message_pump and cef_do_message_loop_work() in cases where the CEF
// message loop must be integrated into an existing application message loop
// (see additional comments and warnings on CefDoMessageLoopWork). This
// callback should schedule a cef_do_message_loop_work() call to happen on the
// main (UI) thread. |delay_ms| is the requested delay in milliseconds. If
// |delay_ms| is <= 0 then the call should happen reasonably soon. If
// |delay_ms| is > 0 then the call should be scheduled to happen after the
// specified delay and any currently pending scheduled call should be
// cancelled.
///
void (CEF_CALLBACK *on_schedule_message_pump_work)(
struct _cef_browser_process_handler_t* self, int64 delay_ms);
} cef_browser_process_handler_t;