updated uuid libs

lib/uuid-log/src/print_handler.cpp

@@ -0,0 +1,106 @@
+/*
+ * uuid-log - Microcontroller logging framework
+ * Copyright 2022  Simon Arlott
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <uuid/log.h>
+
+#include <Arduino.h>
+
+#include <memory>
+#if UUID_LOG_THREAD_SAFE
+#include <mutex>
+#endif
+
+namespace uuid {
+
+namespace log {
+
+PrintHandler::PrintHandler(::Print & print)
+    : print_(print) {
+}
+
+size_t PrintHandler::maximum_log_messages() const {
+#if UUID_LOG_THREAD_SAFE
+    std::lock_guard<std::mutex> lock{mutex_};
+#endif
+
+    return maximum_log_messages_;
+}
+
+void PrintHandler::maximum_log_messages(size_t count) {
+#if UUID_LOG_THREAD_SAFE
+    std::lock_guard<std::mutex> lock{mutex_};
+#endif
+
+    maximum_log_messages_ = std::max((size_t)1, count);
+
+    while (log_messages_.size() > maximum_log_messages_) {
+        log_messages_.pop_front();
+    }
+}
+
+void PrintHandler::loop(size_t count) {
+#if UUID_LOG_THREAD_SAFE
+    std::unique_lock<std::mutex> lock{mutex_};
+#endif
+
+    count = std::max((size_t)1, count);
+
+    while (!log_messages_.empty()) {
+        auto message = log_messages_.front();
+
+        log_messages_.pop_front();
+#if UUID_LOG_THREAD_SAFE
+        lock.unlock();
+#endif
+
+        print_.print(uuid::log::format_timestamp_ms(message->uptime_ms, 3).c_str());
+        print_.print(' ');
+        print_.print(uuid::log::format_level_char(message->level));
+        print_.print(" [");
+        print_.print(message->name);
+        print_.print("] ");
+        print_.println(message->text.c_str());
+
+        count--;
+        if (count == 0) {
+            break;
+        }
+
+        ::yield();
+
+#if UUID_LOG_THREAD_SAFE
+        lock.lock();
+#endif
+    }
+}
+
+void PrintHandler::operator<<(std::shared_ptr<Message> message) {
+#if UUID_LOG_THREAD_SAFE
+    std::lock_guard<std::mutex> lock{mutex_};
+#endif
+
+    if (log_messages_.size() >= maximum_log_messages_) {
+        log_messages_.pop_front();
+    }
+
+    log_messages_.emplace_back(std::move(message));
+}
+
+} // namespace log
+
+} // namespace uuid