blob: f1c1bff4cb0d63e7afa92233bb03d35bb660fdb3 [file] [log] [blame]
/*
* Copyright (c) 2018 Intel Corporation.
*
* SPDX-License-Identifier: Apache-2.0
*/
#ifndef ZEPHYR_INCLUDE_SYS_ERRNO_PRIVATE_H_
#define ZEPHYR_INCLUDE_SYS_ERRNO_PRIVATE_H_
#include <toolchain.h>
#ifdef __cplusplus
extern "C" {
#endif
/* NOTE: located here to avoid include dependency loops between errno.h
* and kernel.h
*/
#ifdef CONFIG_ERRNO_IN_TLS
extern __thread int z_errno_var;
static inline int *z_errno(void)
{
return &z_errno_var;
}
#else
/**
* return a pointer to a memory location containing errno
*
* errno is thread-specific, and can't just be a global. This pointer
* is guaranteed to be read/writable from user mode.
*
* @return Memory location of errno data for current thread
*/
__syscall int *z_errno(void);
#endif /* CONFIG_ERRNO_IN_TLS */
#ifdef __cplusplus
}
#endif
#ifndef CONFIG_ERRNO_IN_TLS
#include <syscalls/errno_private.h>
#endif /* CONFIG_ERRNO_IN_TLS */
#endif /* ZEPHYR_INCLUDE_SYS_ERRNO_PRIVATE_H_ */