thread_arch.h
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/*
* Copyright (C) 2014 Freie Universität Berlin
*
* This file is subject to the terms and conditions of the GNU Lesser
* General Public License v2.1. See the file LICENSE in the top level
* directory for more details.
*/
/**
* @ingroup core_arch
* @{
*
* @file
* @brief Architecture dependent kernel interface for handling and managing threads
*
* @author Hauke Petersen <hauke.petersen@fu-berlin.de>
*/
#ifndef THREAD_ARCH_H
#define THREAD_ARCH_H
#include "kernel_defines.h"
#ifdef __cplusplus
extern "C" {
#endif
/**
* @name Define the mapping between the architecture independent interfaces
* and the kernel internal interfaces
*
* This mapping is done for compatibility of existing platforms,
* new platforms should always use the *_arch_* interfaces.
* @{
*/
#ifdef COREIF_NG
#define thread_stack_init thread_arch_stack_init
#define thread_print_stack thread_arch_print_stack
#define cpu_switch_context_exit thread_arch_start_threading
#define thread_yield_higher thread_arch_yield
#endif
/** @} */
/**
* @brief Prototype for a thread entry function
*/
typedef void *(*thread_task_func_t)(void *arg);
/**
* @brief Initialize a thread's stack
*
* @param[in] task_func pointer to the thread's code
* @param[in] arg argument to task_func
* @param[in] stack_start pointer to the start address of the thread
* @param[in] stack_size the maximum size of the stack
*
* @return pointer to the new top of the stack
*/
char *thread_arch_stack_init(thread_task_func_t task_func, void *arg, void *stack_start, int stack_size);
/**
* @brief Get the number of bytes used on the ISR stack
*/
int thread_arch_isr_stack_usage(void);
/**
* @brief Get the current ISR stack pointer
*/
void *thread_arch_isr_stack_pointer(void);
/**
* @brief Get the start of the ISR stack
*/
void *thread_arch_isr_stack_start(void);
/**
* @brief Print the current stack to stdout
*/
void thread_arch_stack_print(void);
/**
* @brief Start threading by loading a threads initial information from the stack
*/
void thread_arch_start_threading(void) NORETURN;
/**
* @brief Pause the current thread and schedule the next pending, if available
*/
void thread_arch_yield(void);
#ifdef __cplusplus
}
#endif
#endif /* THREAD_ARCH_H */
/** @} */