/* * Copyright (C) 2014 BlueKitchen GmbH * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the copyright holders nor the names of * contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * 4. Any redistribution, use, or modification is done solely for * personal benefit and not for any commercial purpose or for * monetary gain. * * THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL MATTHIAS * RINGWALD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * Please inquire about commercial licensing options at * contact@bluekitchen-gmbh.com * */ #define BTSTACK_FILE__ "btstack_run_loop_windows.c" /* * btstack_run_loop_windows.c */ #include "btstack_run_loop.h" #include "btstack_run_loop_windows.h" #include "btstack_linked_list.h" #include "btstack_debug.h" #include "btstack_util.h" #include #include #include // start time. static ULARGE_INTEGER start_time; /** * @brief Queries the current time in ms since start */ static uint32_t btstack_run_loop_windows_get_time_ms(void){ FILETIME file_time; SYSTEMTIME system_time; ULARGE_INTEGER now_time; GetSystemTime(&system_time); SystemTimeToFileTime(&system_time, &file_time); now_time.LowPart = file_time.dwLowDateTime; now_time.HighPart = file_time.dwHighDateTime; uint32_t time_ms = (now_time.QuadPart - start_time.QuadPart) / 10000; log_debug("btstack_run_loop_windows_get_time_ms: %u", time_ms); return time_ms; } /** * Execute run_loop */ static void btstack_run_loop_windows_execute(void) { btstack_linked_list_iterator_t it; while (true) { // process timers uint32_t now_ms = btstack_run_loop_windows_get_time_ms(); btstack_run_loop_base_process_timers(now_ms); // get next timeout int32_t timeout_ms = btstack_run_loop_base_get_time_until_timeout(now_ms); if (timeout_ms < 0){ timeout_ms = INFINITE; } // collect handles to wait for HANDLE handles[100]; memset(handles, 0, sizeof(handles)); int num_handles = 0; btstack_linked_list_iterator_init(&it, &btstack_run_loop_base_data_sources); while (btstack_linked_list_iterator_has_next(&it)){ btstack_data_source_t *ds = (btstack_data_source_t*) btstack_linked_list_iterator_next(&it); if (ds->source.handle == 0) continue; if (ds->flags & (DATA_SOURCE_CALLBACK_READ | DATA_SOURCE_CALLBACK_WRITE)){ handles[num_handles++] = ds->source.handle; log_debug("btstack_run_loop_execute adding handle %p", ds->source.handle); } } // wait for timeout or data source to become ready int res; if (num_handles){ // wait for ready Events or timeout res = WaitForMultipleObjects(num_handles, &handles[0], 0, timeout_ms); } else { // just wait for timeout Sleep(timeout_ms); res = WAIT_TIMEOUT; } // process data source if (WAIT_OBJECT_0 <= res && res < (WAIT_OBJECT_0 + num_handles)){ void * triggered_handle = handles[res - WAIT_OBJECT_0]; btstack_linked_list_iterator_init(&it, &btstack_run_loop_base_data_sources); while (btstack_linked_list_iterator_has_next(&it)){ btstack_data_source_t *ds = (btstack_data_source_t*) btstack_linked_list_iterator_next(&it); log_debug("btstack_run_loop_windows_execute: check ds %p with handle %p\n", ds, ds->source.handle); if (triggered_handle == ds->source.handle){ if (ds->flags & DATA_SOURCE_CALLBACK_READ){ log_debug("btstack_run_loop_windows_execute: process read ds %p with handle %p\n", ds, ds->source.handle); ds->process(ds, DATA_SOURCE_CALLBACK_READ); } else if (ds->flags & DATA_SOURCE_CALLBACK_WRITE){ log_debug("btstack_run_loop_windows_execute: process write ds %p with handle %p\n", ds, ds->source.handle); ds->process(ds, DATA_SOURCE_CALLBACK_WRITE); } break; } } } } } // set timer static void btstack_run_loop_windows_set_timer(btstack_timer_source_t *a, uint32_t timeout_in_ms){ uint32_t time_ms = btstack_run_loop_windows_get_time_ms(); a->timeout = time_ms + timeout_in_ms; log_debug("btstack_run_loop_windows_set_timer to %u ms (now %u, timeout %u)", a->timeout, time_ms, timeout_in_ms); } static void btstack_run_loop_windows_init(void){ btstack_run_loop_base_init(); // store start time FILETIME file_time; SYSTEMTIME system_time; GetSystemTime(&system_time); SystemTimeToFileTime(&system_time, &file_time); start_time.LowPart = file_time.dwLowDateTime; start_time.HighPart = file_time.dwHighDateTime; log_debug("btstack_run_loop_windows_init"); } static const btstack_run_loop_t btstack_run_loop_windows = { &btstack_run_loop_windows_init, &btstack_run_loop_base_add_data_source, &btstack_run_loop_base_remove_data_source, &btstack_run_loop_base_enable_data_source_callbacks, &btstack_run_loop_base_disable_data_source_callbacks, &btstack_run_loop_windows_set_timer, &btstack_run_loop_base_add_timer, &btstack_run_loop_base_remove_timer, &btstack_run_loop_windows_execute, &btstack_run_loop_base_dump_timer, &btstack_run_loop_windows_get_time_ms, }; /** * Provide btstack_run_loop_windows instance */ const btstack_run_loop_t * btstack_run_loop_windows_get_instance(void){ return &btstack_run_loop_windows; }