result.h

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/* Simple Plugin API
 *
 * Copyright © 2018 Wim Taymans
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice (including the next
 * paragraph) shall be included in all copies or substantial portions of the
 * Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
 */
 
#ifndef SPA_UTILS_RESULT_H
#define SPA_UTILS_RESULT_H
 
#ifdef __cplusplus
extern "C" {
#endif
 
#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 */