58 lines
1.4 KiB
C
58 lines
1.4 KiB
C
#ifndef __CORE_RINGBUF_H__
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#define __CORE_RINGBUF_H__
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#include "core.h"
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#ifdef __cplusplus
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extern "C" {
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#endif /* __cplusplus */
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struct _rbuf_header_t {
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int head, tail, size;
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char *pool;
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};
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#define rbuf_declare(__name, __size) \
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struct { \
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struct _rbuf_header_t h; \
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char int_pool[(__size) + 1]; \
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} __name
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#define rbuf_declare_ext(__name) \
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struct { \
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struct _rbuf_header_t h; \
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} __name
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#define rbuf_init(__pname, __size) \
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((__pname)->h.head = (__pname)->h.tail = 0, \
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(__pname)->h.size = __size, \
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(__pname)->h.pool = (__pname)->int_pool)
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#define rbuf_init_ext(__pname, __size, __ext_pool) \
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((__pname)->h.head = (__pname)->h.tail = 0, \
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(__pname)->h.size = __size, \
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(__pname)->h.pool = (char *)(__ext_pool))
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#define rbuf_size(__pname) ((__pname)->h.size)
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#define rbuf_is_empty(__pname) ((__pname)->h.head == (__pname)->h.tail)
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#define rbuf_is_full(__pname) (rbuf_free_bytes(__pname) == 0)
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CORE_DECLARE(int) rbuf_bytes(void *__pname);
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CORE_DECLARE(int) rbuf_free_bytes(void *__pname);
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CORE_DECLARE(int) rbuf_skip_write_pos(void *__pname, int __len);
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CORE_DECLARE(int) rbuf_write(void *__pname, const char *__buf, int __buf_len);
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CORE_DECLARE(int) rbuf_skip_read_pos(void *__pname, int __len);
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CORE_DECLARE(int) rbuf_read(void *__pname, char *__buf, int __buf_len);
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#ifdef __cplusplus
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}
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#endif /* __cplusplus */
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#endif /* ! __CORE_RINGBUF_H__ */
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