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/* Simple Plugin API */
/* SPDX-FileCopyrightText: Copyright © 2018 Wim Taymans */
/* SPDX-License-Identifier: MIT */

#ifndef SPA_UTILS_RESULT_H
#define SPA_UTILS_RESULT_H

#ifdef __cplusplus
extern "C" {
#endif

/**
 * \defgroup spa_result Result handling
 * Asynchronous result utilities
 */

/**
 * \addtogroup spa_result
 * \{
 */

#include <spa/utils/defs.h>
#include <spa/utils/list.h>

#define SPA_ASYNC_BIT			(1 << 30)
#define SPA_ASYNC_SEQ_MASK		(SPA_ASYNC_BIT - 1)
#define SPA_ASYNC_MASK			(~SPA_ASYNC_SEQ_MASK)

#define SPA_RESULT_IS_OK(res)		((res) >= 0)
#define SPA_RESULT_IS_ERROR(res)	((res) < 0)
#define SPA_RESULT_IS_ASYNC(res)	(((res) & SPA_ASYNC_MASK) == SPA_ASYNC_BIT)

#define SPA_RESULT_ASYNC_SEQ(res)	((res) & SPA_ASYNC_SEQ_MASK)
#define SPA_RESULT_RETURN_ASYNC(seq)	(SPA_ASYNC_BIT | SPA_RESULT_ASYNC_SEQ(seq))

#define spa_strerror(err)		\
({					\
	int _err = -(err);		\
	if (SPA_RESULT_IS_ASYNC(err))	\
		_err = EINPROGRESS;	\
	strerror(_err);			\
})

/**
 * \}
 */

#ifdef __cplusplus
} /* extern "C" */
#endif

#endif /* SPA_UTILS_RESULT_H */