feat(pthread): Bring "pthread" from esp-idf

Commit ID: df786128

components/pthread/include/esp_pthread.h

@@ -0,0 +1,67 @@
+// Copyright 2018 Espressif Systems (Shanghai) PTE LTD
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#pragma once
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <pthread.h>
+
+/** pthread configuration structure that influences pthread creation */
+typedef struct {
+    size_t stack_size;    ///< the stack size of the pthread
+    size_t prio;          ///< the thread's priority
+    bool inherit_cfg;     ///< inherit this configuration further
+} esp_pthread_cfg_t;
+
+/**
+ * @brief Configure parameters for creating pthread
+ *
+ * This API allows you to configure how the subsequent
+ * pthread_create() call will behave. This call can be used to setup
+ * configuration parameters like stack size, priority, configuration
+ * inheritance etc.
+ *
+ * If the 'inherit' flag in the configuration structure is enabled,
+ * then the same configuration is also inherited in the thread
+ * subtree.
+ *
+ * @param cfg The pthread config parameters
+ *
+ * @return
+ *      - ESP_OK if configuration was successfully set
+ *      - ESP_ERR_NO_MEM if out of memory
+ */
+esp_err_t esp_pthread_set_cfg(const esp_pthread_cfg_t *cfg);
+
+/**
+ * @brief Get current pthread creation configuration
+ *
+ * This will retrieve the current configuration that will be used for
+ * creating threads.
+ *
+ * @param p Pointer to the pthread config structure that will be
+ * updated with the currently configured parameters
+ *
+ * @return
+ *      - ESP_OK if the configuration was available
+ *      - ESP_ERR_NOT_FOUND if a configuration wasn't previously set
+ */
+esp_err_t esp_pthread_get_cfg(esp_pthread_cfg_t *p);
+
+#ifdef __cplusplus
+}
+#endif