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模仿kfifo实现的环形缓冲区& U+ l4 F/ ]# A
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转载来源:模仿kfifo实现的环形缓冲区, p8 P0 z" a& [) J$ q# |2 T
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& \$ k, t- _" B) n1 m( l; _GitHub仓库:http://github.com/XinLiGitHub/RingBuffer
4 B; n* A6 k4 I# I+ w, ]0 p7 r0 PPS:博文不再更新,后续更新会在GitHub仓库进行。
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模仿kfifo实现的环形缓冲区。程序中涉及到环形缓冲区的概念,详细介绍见维基百科[Circular buffer](http://en.wikipedia.org/wiki/Circular_buffer)。
0 e9 ]8 E) C5 K2 T# M" Q; s/ g+ Z/ i7 u) m" h
1,开发环境: @- b, D# L+ J; X* q
1,操作系统:Windows 10 专业版
3 `% k/ C$ [8 D- K. x; r 2,IDE:Visual Studio 2015 专业版8 N5 Y! r& }3 x7 Q% A9 @
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2,程序源码6 f- ^) _; y& c7 O6 @4 m: [
RingBuffer.h文件( t: [* g8 [. k, t% r w
- /**2 g6 `" [( r" G% L
- ******************************************************************************5 U! T7 U" I- N2 D1 M8 j" C
- * @file RingBuffer.h
7 u) T4 `& ^% Q+ a9 [% \ - * @author XinLi
6 s' B- Q% V6 w - * @version v1.0! i, m9 P* s, p9 ?+ \0 S
- * @date 15-January-2018! o3 F; x6 f$ ]! g$ c# _2 P
- * @brief Header file for RingBuffer.c module.
; y( s1 x g9 Y" i) q - ******************************************************************************+ j0 @0 @& H" |. n8 ~1 J
- * @attention6 t$ w+ ^, p8 m: Z( q
- *0 I+ E- O" `9 d1 a3 D- A: O
- * <h2><center>Copyright © 2018 XinLi</center></h2>9 m. p6 g) v& |; w3 W& N& w( k
- *( E+ I" W6 D( m4 X9 X8 y( u
- * This program is free software: you can redistribute it and/or modify2 Q. v9 l0 ^* D. H
- * it under the terms of the GNU General Public License as published by
* t1 j0 j) {$ y9 o+ D ?% x - * the Free Software Foundation, either version 3 of the License, or- [, N( ^. E; H! l/ R' ]( j
- * (at your option) any later version.
) |7 D6 } q) e$ M - *7 g) X" L. T. t2 ?% m$ `
- * This program is distributed in the hope that it will be useful,( _4 V4 a1 u( c0 J2 F
- * but WITHOUT ANY WARRANTY; without even the implied warranty of1 P, H2 ?3 C% p5 R/ {. r
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
; B! v Y9 h1 H2 S - * GNU General Public License for more details.4 D' [- D& _; r
- */ Q& \, ]: P7 p! D' ]2 R
- * You should have received a copy of the GNU General Public License
/ k# Z' L6 F" _9 Y, `0 l - * along with this program. If not, see <http://www.gnu.org/licenses/>.
3 W/ A0 r! s T# L& A6 A - *
5 b) n! V/ [+ j - ******************************************************************************" k7 Y) x/ k% ^9 q
- */8 ?" _0 j* S$ Y2 `, g2 M
- 5 |. i5 g P( E o$ ]' _0 ~
- #ifndef __RINGBUFFER_H3 h2 w6 D4 u5 y" k
- #define __RINGBUFFER_H
+ [7 x$ ^( B3 h1 {% B, s
8 I1 o# X5 Z6 s, z9 D3 V" R- #ifdef __cplusplus) P7 N- j$ Z, ?; |+ z; h
- extern "C" {
. k+ ~0 F! n5 C& K/ u& d - #endif
0 _! W7 V8 v1 g! j- `% ?3 v
# R+ X+ q; L$ l+ i- /* Header includes -----------------------------------------------------------*/
. |; O8 e( b$ T' c. t - #include <stdint.h>" H% g% s& e" S4 [9 G4 n, t& e0 h$ w e
- #include <stdbool.h>3 A/ x5 }0 z4 p
- 8 t! j( x9 r9 W' u) ^) J
- /* Macro definitions ---------------------------------------------------------*/
/ D7 n- @& m: a( a - #define RING_BUFFER_MALLOC(size) malloc(size)/ v! X1 J! ^/ _( }. t
- #define RING_BUFFER_FREE(block) free(block)
4 U5 F2 s9 T: \) ~
# ]- K' ]' M6 _+ o3 \1 @' M- /* Type definitions ----------------------------------------------------------*/
" u: U5 g; ]& A% h8 F( p - typedef struct
; N' B: Q, K! M; o - {
# \0 d; ]2 j% @& [* H) M - uint8_t *buffer;1 P+ n$ [" F I: q
- uint32_t size;
8 z4 e' m0 K7 B' q - uint32_t in;
( K7 s' l) p/ r6 ]( q. H - uint32_t out;6 \, V# |& o: S! D9 D- M; x- y2 W7 V+ s
- }RingBuffer;
' o4 B+ ~4 c) z2 o0 j. s3 ?& w1 s2 w - 8 ^& l" c6 w8 ^
- /* Variable declarations -----------------------------------------------------*/
4 `4 g3 o0 ?# S) B8 y; _! y. R - /* Variable definitions ------------------------------------------------------*/' _4 J" N# ^/ C" {
- /* Function declarations -----------------------------------------------------*/. D: M3 X' T3 j Y: k8 ^
- RingBuffer *RingBuffer_Malloc(uint32_t size);0 O1 p' l+ U0 N0 W B9 p
- void RingBuffer_Free(RingBuffer *fifo);& t; P2 ]5 t6 R4 a, }# l8 c- S% Z
- uint32_t RingBuffer_In(RingBuffer *fifo, void *in, uint32_t len);
/ V; L3 s' x4 \6 } - uint32_t RingBuffer_Out(RingBuffer *fifo, void *out, uint32_t len);6 H4 x2 i; W0 H. e7 @
- 2 S- {$ `* `" n* i$ B* N
- /* Function definitions ------------------------------------------------------*/7 w& b6 g$ q& t7 U3 r8 a
9 T$ I. |* l1 d# F) e- /**
0 @1 z0 q# g) i1 ?- u" ?7 Y1 ^ - * @brief Removes the entire FIFO contents.
& Y- Q6 g4 V- Z$ {' h - * @param [in] fifo: The fifo to be emptied.- ] ?0 j$ P7 C# z4 w- A
- * @return None." y: |4 c3 P5 B8 n
- */
, D2 j( G) o2 u: L' c! ]% C - static inline void RingBuffer_Reset(RingBuffer *fifo)
1 X! c2 x' O' N1 F M( d - {
" `5 d, W0 g( g' s2 y3 i - fifo->in = fifo->out = 0;
, i5 v% O# o. g1 m9 } - }
& |9 X6 T! e+ @8 ^: l- X" F5 ]
$ E2 r& K0 P2 D; U- /**0 M% m" ^: x8 k' l& A: n6 F9 _
- * @brief Returns the size of the FIFO in bytes. |, x8 s0 q$ n- `2 f2 ^# r
- * @param [in] fifo: The fifo to be used.0 F% Z( j+ ?1 j$ P5 W- g2 J
- * @return The size of the FIFO.
5 |& B, u4 G7 [ D - */
; x8 I: E2 R) a& ]3 _ - static inline uint32_t RingBuffer_Size(RingBuffer *fifo). ?3 H. t7 P# @% y* Z
- {
! W4 s& b8 l7 a& ~0 n( s - return fifo->size;
: d! p6 h2 D4 } - }# b2 B& C4 B0 x% N6 U% O
- + F$ F* _- }8 x
- /**. o* K, {: a [
- * @brief Returns the number of used bytes in the FIFO.
* v8 B: w4 T' ^2 K - * @param [in] fifo: The fifo to be used.& H( N4 B( k8 ]5 w }
- * @return The number of used bytes.! R2 e6 e" {! g' d w
- */
: f F- L4 a4 q: U - static inline uint32_t RingBuffer_Len(RingBuffer *fifo), x1 U2 f- ~( s d
- {
' W, g& _1 \ u } - return fifo->in - fifo->out;# \0 Z* N# b6 x$ J
- }! k3 R# F7 s& R. D
- _$ R4 ]- U# _) F- D( r! e- ]- /**
+ Z) Z: G7 d3 k1 h; _$ ~ - * @brief Returns the number of bytes available in the FIFO.
( D" z' Z0 y2 x3 A - * @param [in] fifo: The fifo to be used.* N6 Z$ X& }+ F1 q7 q
- * @return The number of bytes available.
& Y/ r8 _: L- Q5 r' G6 j+ ] - */
) u' i5 M/ A+ H7 x - static inline uint32_t RingBuffer_Avail(RingBuffer *fifo)/ h: v* P2 p0 {5 C' L
- {4 A) O- p, }: x* A7 d
- return RingBuffer_Size(fifo) - RingBuffer_Len(fifo);7 p5 u1 j" O: p6 O- d- [4 B$ X
- }5 W0 ?! m; E6 e
- 4 G0 \4 w! v" ~1 H
- /**
- A: V% K2 K/ u. F - * @brief Is the FIFO empty?, ~3 j1 H6 q& r
- * @param [in] fifo: The fifo to be used.
1 s8 b. F$ S$ S: a6 n4 A - * @retval true: Yes.- r! t1 i$ k3 f& M
- * @retval false: No. u: _/ ~+ ]" l! B' ]
- *// \' M0 t+ h( `" h( e* z0 s R
- static inline bool RingBuffer_IsEmpty(RingBuffer *fifo)% I7 A4 z! Q; x' }4 u2 E
- {2 ~: q. O( ~& h' Q: b, q
- return RingBuffer_Len(fifo) == 0;
7 y/ z0 v% n/ f2 Y9 ? - }
/ F4 o- W+ x N% l! u; v: W$ E - $ U* m0 I7 B1 {5 ]8 `' w
- /**
0 \, e' f& d [ x - * @brief Is the FIFO full?9 g. a) [( L0 ^9 d
- * @param [in] fifo: The fifo to be used.
; W- d. E5 X9 C' t - * @retval true: Yes.5 }4 {2 ]/ ?( `' l. I
- * @retval false: No.
1 {% \5 l# h$ B* U, G3 b - */
. M2 O% t/ v! F4 P( }3 I" j - static inline bool RingBuffer_IsFull(RingBuffer *fifo)
) v- Z6 X3 e' ]/ n( N! ^6 g; R - {8 j5 _2 r/ P8 {! R6 ]
- return RingBuffer_Avail(fifo) == 0;
' n' j. \1 P ?* v - }- K3 w" ~9 _8 X0 T; D# ^8 D
" W) X% B1 x1 C- #ifdef __cplusplus
0 w0 h; b: B: x - }
) U$ |/ j0 `3 r R7 H8 j' n+ [ - #endif
7 M" H, y( ~$ P9 F# S# B; C. W3 b
9 _1 i$ k) e7 j( L6 t( c2 p8 _% X- #endif /* __RINGBUFFER_H */) ^8 K3 c9 P% Z" U9 `( e" V
复制代码 3 l8 o& l; `4 [$ ^
RingBuffer.c文件0 b, _8 |, M+ O& k( @4 \3 f5 P
- /**
4 ?2 }1 G) r# N! w9 {2 t. L - ******************************************************************************
' `8 _# `2 Y) [/ G6 w; Z( H4 i E - * @file RingBuffer.c
2 M6 @- i9 t& E; \% k6 Q! G - * @author XinLi
$ K6 c( B. ~6 S0 z, l1 _4 i - * @version v1.0
# ^+ A& R7 _2 R8 ?$ G6 X5 g - * @date 15-January-20186 ^ p" d# W) d& r; A2 Q0 C1 z' x
- * @brief Ring buffer module source file.2 o% A0 P* r3 Y) h$ a. W
- ******************************************************************************
) q" I& _% v+ l! \' N - * @attention( t# ?6 P- G* Q+ b
- *$ K3 C4 D' b7 B- ^* a8 T- J
- * <h2><center>Copyright © 2018 XinLi</center></h2>2 y9 y2 D% M8 w' ?
- *
( [6 z- J( Q7 F) I) J - * This program is free software: you can redistribute it and/or modify4 n$ |3 i( Z4 }$ r2 V* X9 [
- * it under the terms of the GNU General Public License as published by3 `; J# Z' b# ] Y$ W6 ]" s
- * the Free Software Foundation, either version 3 of the License, or4 v. _* x+ w' C/ c2 B: `% Z
- * (at your option) any later version.
- N' h2 B* s' L, w - *- Y+ e+ y/ k1 F8 T0 J5 e9 K) i( F
- * This program is distributed in the hope that it will be useful,' ?, B& w, _0 z+ k0 Q, A
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
8 M- _; D) K" |8 o' }! P5 W/ M8 Z - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the$ i6 Q1 x/ Z. u7 B0 o* G# v/ l
- * GNU General Public License for more details.. n7 x3 x# z; J/ Q& G/ g6 r& U6 v
- *
+ h" T7 I G4 m4 o) c - * You should have received a copy of the GNU General Public License9 N0 b- {8 D4 D1 [2 k/ H( d) @
- * along with this program. If not, see <http://www.gnu.org/licenses/>./ y, D }+ }( a; l% W( ^
- *$ ?0 Z. O J1 g6 o
- ******************************************************************************8 X' }( ~% e) }# C9 c+ d5 }
- */
8 `/ l1 s( v$ ?' ^ - # M2 N7 B+ c0 E! a! S3 {9 L
- /* Header includes -----------------------------------------------------------*/* ~; f, v3 ^, Z* x4 B4 O
- #include "RingBuffer.h"
7 }7 f% H# m+ Z6 [& n% x% S/ R - #include <stdlib.h>
H. I# ^; a, g" \& ^& T; \ - #include <string.h>4 _- E! b J/ `+ K* B8 K$ g" R
- % g- a. v; Y) D# u# f- @3 ?2 k
- /* Macro definitions ---------------------------------------------------------*/
, l0 u7 `* s+ Q/ v: g n# I! M - /* Type definitions ----------------------------------------------------------*/
& e6 O, D% e& Z2 c5 w* i: q# o$ b - /* Variable declarations -----------------------------------------------------*/$ J/ P" S) }2 d+ O
- /* Variable definitions ------------------------------------------------------*/1 v4 }: F7 Z5 o" X- u4 n4 Q
- /* Function declarations -----------------------------------------------------*/
+ L0 P, u: t& F" s r3 s - static bool is_power_of_2(uint32_t x);
/ _2 `" L( _$ X/ }/ V5 u. w: d @ - static uint32_t roundup_pow_of_two(uint32_t x);
m+ Q+ ^( ]- W6 g P6 U7 o4 N - $ T& h# D$ W. T
- /* Function definitions ------------------------------------------------------*/
8 M+ M) P0 C3 X' }& {. N& D: H6 U7 {9 n
7 J! S( |+ O9 u$ n- /**7 ?3 V) z% L7 V( j, T$ s
- * @brief Allocates a new FIFO and its internal buffer.+ v* E' x4 E3 g
- * @param [in] size: The size of the internal buffer to be allocated.4 g/ G& M$ V6 c5 x9 X# w- r
- * @note The size will be rounded-up to a power of 2.' q- L m! W$ Z- j/ ? b) J t
- * @return RingBuffer pointer.8 Y2 C9 i2 \0 _2 }, Z! b( B
- */
4 D% y9 L1 q. B. _) a0 @ - RingBuffer *RingBuffer_Malloc(uint32_t size)2 n, X2 I. c- b8 S( ]2 ?
- { ?. W* ~5 F! o, n" F/ v- y- O
- RingBuffer *fifo = RING_BUFFER_MALLOC(sizeof(RingBuffer));
4 H/ Y2 B( d3 M2 Q' t+ W; z: g - $ \" H2 G/ W& K' `0 ^ j/ y$ p7 U
- if(fifo != NULL)7 S. | [) I8 ?9 y
- {
" q! C0 y6 F% v! `2 q" D - if(is_power_of_2(size) != true)
1 B9 g M3 e! A0 t {& e' ^ - {
& W) g' g9 v0 l, a - if(size > 0x80000000UL)
% M d2 L; W. \6 E: j- r/ } - {
$ o8 Z7 j( b, `) Z - RING_BUFFER_FREE(fifo);
# [# k, Y! C" V5 @+ N9 v - fifo = NULL;) @/ [3 W( D3 i# E2 k$ L# R
- return fifo;) Z. N) O4 ]/ H% Q5 \& W. z
- }
+ o" L: z2 n( z+ S+ M% e - ! {- K" R. G6 l0 V
- size = roundup_pow_of_two(size);- W* |) K0 K/ H3 z1 ^! |3 @& Q6 {
- }
. z6 _# l, P( o
4 A: c( w, C1 N3 d! Z- fifo->size = size;
' t5 w5 d. ?& U: o$ R - fifo->in = 0;5 H) S8 j0 l, D& I. S* V
- fifo->out = 0;
8 z. K* f' B, L. X) L& m/ r - fifo->buffer = RING_BUFFER_MALLOC(fifo->size);2 j- ^1 |5 \' K) I5 M2 x
7 Z' [. |0 b! p) E$ [+ ]' |6 e2 K- if(fifo->buffer == NULL)! o- D9 ?# T% B% s) c$ q/ r( [
- {
' O$ [) ^$ ]5 M& r8 v- K( i - RING_BUFFER_FREE(fifo);
0 h; b. R. X8 M4 H - fifo = NULL;
: Q* R9 w6 V4 ]7 B. n$ j2 T - return fifo;" @/ {1 Y4 R! f4 j s. j
- }
! \2 B- t: C8 p9 B% _5 M - }5 K( i. D% ? ?' U; X9 m# r+ m
- " E/ c1 W$ _8 ?. A, {
- return fifo;
$ ]! i4 x) O, P# n0 k/ ?4 ^ - }% W" \% d' y( m/ R; ~
- # m3 k7 B2 K2 P5 b0 V5 d9 L
- /**- _0 E4 ^; R$ s3 a5 R$ J! Q$ ?/ F$ e" J* C
- * @brief Frees the FIFO.
, r' x8 Y5 {7 F( x, c - * @param [in] fifo: The fifo to be freed.& }; S) ]4 Y3 q. N5 \
- * @return None.
. P& I& ~7 \! W% F+ Y+ H& E; ~ - */
- [0 N; S6 K8 u* S3 k" \ o+ u- ? - void RingBuffer_Free(RingBuffer *fifo)
( W' p" Z( f2 c0 s8 }4 a. J - {
; J5 L3 s; h8 [! L - RING_BUFFER_FREE(fifo->buffer);
2 Q" B/ O& B9 A, v$ a - RING_BUFFER_FREE(fifo);; q# n& j8 M2 f: W) p( Z4 T
- fifo = NULL;6 J# b" v. U/ }( N2 g) G* C
- }$ a9 \( g0 ~/ f) C
* v9 [; f& v$ ^; N& B8 A' P- /**
8 d( o) u& `3 Y1 \# e, f! A - * @brief Puts some data into the FIFO.
$ b( }* K4 e+ n( v( z% v( F - * @param [in] fifo: The fifo to be used.
1 }+ M' `3 t. j; J( G - * @param [in] in: The data to be added.
$ t& [- D( Q) F, w- r: Y0 ] - * @param [in] len: The length of the data to be added.
3 A B1 s4 [8 | `+ G - * @return The number of bytes copied.
' G- O; w+ A2 {2 v/ M - * @note This function copies at most @len bytes from the @in into
- }0 ?; {! ^9 W+ f2 M8 C& \1 W - * the FIFO depending on the free space, and returns the number
# h/ M' _; H, L% R( D8 A - * of bytes copied.1 u. V/ n5 V, P8 u: _/ H
- */$ S, S* Q5 n4 z: B. B; b3 ~
- uint32_t RingBuffer_In(RingBuffer *fifo, void *in, uint32_t len)
7 g7 b, g: _+ [! E' |9 J - {
% w5 n. {8 K' [1 e! P; P, l2 ~# T - len = min(len, RingBuffer_Avail(fifo));% N( ^0 c5 e% T- E! R/ \
- 5 A6 C) I' E- w; W; Q
- /* First put the data starting from fifo->in to buffer end. */( Z% A, d) \( s; f; R
- uint32_t l = min(len, fifo->size - (fifo->in & (fifo->size - 1)));
- p$ j5 V G5 G" T0 [, W - memcpy(fifo->buffer + (fifo->in & (fifo->size - 1)), in, l);
' p) B# V$ J/ p% @0 W$ ` - 1 W! `- o, H! N2 R% b- g$ D. S
- /* Then put the rest (if any) at the beginning of the buffer. */
: G7 D& M0 N# N) H+ U - memcpy(fifo->buffer, (uint8_t *)in + l, len - l);
' A) n' D1 [ [- G- k; O5 S
. [8 T+ X5 s' B3 l- fifo->in += len;) s+ D, @+ I p7 V
- 9 u7 D' ^% ~! }7 q# m5 x8 m" g5 `- N
- return len;
& l% V: o0 s! R4 @" S) [ - }
( I3 A/ Y; s5 b( A Q: T* {' ^
0 L( t# d" t" `. A2 G: @$ X( L r- /**# B9 L( F$ e$ R5 W# P; y7 c% J5 [
- * @brief Gets some data from the FIFO.4 z$ S6 ^2 f: U; W& C
- * @param [in] fifo: The fifo to be used.# T$ y, p8 |( b, `9 @3 L
- * @param [in] out: Where the data must be copied.
4 e# [! L' o- g - * @param [in] len: The size of the destination buffer.3 G. h! X8 }8 J
- * @return The number of copied bytes.8 {5 c L. `+ G8 q
- * @note This function copies at most @len bytes from the FIFO into% h' Y( @& }& p- Q) R# i
- * the @out and returns the number of copied bytes.% l: @! E" T: H7 G% n2 U
- */9 V' l+ ~) E" C; N8 S, f
- uint32_t RingBuffer_Out(RingBuffer *fifo, void *out, uint32_t len)
* k. @# ]% Z0 }0 } - {: B$ X+ [& M+ y) {/ F
- len = min(len, RingBuffer_Len(fifo));
6 f. G9 W8 }: u$ e0 `) I1 L' j
0 C5 ~% S5 l$ k, @) y4 H- /* First get the data from fifo->out until the end of the buffer. */
' w+ X3 I- D/ S+ G. a - uint32_t l = min(len, fifo->size - (fifo->out & (fifo->size - 1)));) W' e, y# T" J4 |* Y
- memcpy(out, fifo->buffer + (fifo->out & (fifo->size - 1)), l);7 m$ Y) l$ n( l3 X6 [7 U7 E
[# b3 H9 [8 Q+ r7 @4 q, n+ J; W- /* Then get the rest (if any) from the beginning of the buffer. */
! e! V( Z% A( t- w9 \: v+ l1 [ - memcpy((uint8_t *)out + l, fifo->buffer, len - l);
: i; p3 |" G- t; p- ~% m - $ ^# L# j$ a4 c# R+ \+ `! P) J: X, |
- fifo->out += len;$ ?, F& t. v0 k8 d4 f% L1 Q2 K
' |/ h$ w* ~! E% o7 ~- return len;
5 j* u4 M) g2 M7 R( | - }
1 ^7 g; h% r- b7 O - , R8 F0 h P2 c! b+ S
- /**0 t+ \0 v, g a, R
- * @brief Determine whether some value is a power of two.
4 A {+ P( e9 R* e - * @param [in] x: The number to be confirmed.3 d" t; }3 a8 b- v% |) {- @7 h3 y1 e
- * @retval true: Yes., K: W9 k I* P# |9 n
- * @retval false: No.
2 ]" L$ `' S$ D - * @note Where zero is not considered a power of two." x7 J# S# @! j3 K6 y5 y
- */1 }! Q8 K* Y/ k7 Z8 F
- static bool is_power_of_2(uint32_t x)5 r5 Q0 D& C# X6 r+ i B5 ^
- {6 ]) R& Z3 B0 H1 N. K+ B8 |
- return (x != 0) && ((x & (x - 1)) == 0);
( o0 O O z) \& k6 i - }5 Q5 z% H& [6 O0 [
% I6 Q4 g! c* M# k/ R- /**8 L7 X8 `% j4 L9 \# @
- * @brief Round the given value up to nearest power of two.9 l0 s1 @7 [" P5 m
- * @param [in] x: The number to be converted.
, s8 g- c' h5 K3 I) G. Z - * @return The power of two. L+ v; N3 a d
- */
B4 E1 S, ?8 { - static uint32_t roundup_pow_of_two(uint32_t x)
5 V2 v' M; ~7 ^* c: s% h2 ?3 T - {
& |) u5 ?; Q4 h% i. [% _ - uint32_t b = 0;/ x3 m5 u* m( k9 _ T$ Y# H
- 3 B0 x7 V# v. I
- for(int i = 0; i < 32; i++)* V8 @* @( _7 c8 W1 |6 ^9 r8 t w
- {
. X5 G1 O& B1 K$ Z - b = 1UL << i;
7 g" L; G; U; \; m% ^2 i
- V# [! k/ _$ M d8 a- c- if(x <= b)
+ `( U8 I! K; X4 t - {$ U" H/ u, \% d1 ~) \; D
- break;$ X- ?8 e b5 o: X* i. @& t8 O1 F
- }6 z1 {7 _3 @& c9 z* B5 ?+ k
- }
0 Y- t) S. \. g; z& b
~$ n1 _9 E8 f" f. q6 H- return b;6 r) J5 K1 d( M( h
- }- I; o$ @* g- C) ^* v; W
复制代码 - ^8 E, I9 N, y" S5 t) |5 D
main.c文件* M7 `2 C( X- G5 q5 v! ~6 h1 Q
- /**( ?! |& J! d. J* C- Z9 Y
- ******************************************************************************, s, g. L' p: _8 }% y& Y, ]! L
- * @file main.c6 z1 u! s+ ~. \2 Q
- * @author XinLi( \: q* r) C# l- A$ P3 p- P0 K, z1 y
- * @version v1.0* H% T) O& m& R! W$ H) D0 Z$ k
- * @date 15-January-2018
; i( e p, a4 u; ^3 o5 V$ u/ J - * @brief Main program body.
9 U3 [# ?2 W3 b - ******************************************************************************
9 Q& ]! h9 ?& B7 F - * @attention" z1 j6 h3 b7 C$ H* }' m
- *
1 y4 W/ i5 _) P( ^6 ?0 w' U+ D7 Y" p4 V - * <h2><center>Copyright © 2018 XinLi</center></h2>
! P, K# ~% |2 G: m, X - *) n8 J" I8 p3 d, O# L& m$ q& n
- * This program is free software: you can redistribute it and/or modify3 w" @! b4 ~, Q+ M; a3 f
- * it under the terms of the GNU General Public License as published by3 M7 a& J% ?9 j
- * the Free Software Foundation, either version 3 of the License, or
0 k6 N4 Z/ p. q% C) k - * (at your option) any later version.- o5 r; ~! Z2 V) [' R
- *
4 [; N$ e( f; ~4 ^9 t - * This program is distributed in the hope that it will be useful,
, o3 R5 R5 c4 ]- w5 o4 z - * but WITHOUT ANY WARRANTY; without even the implied warranty of; P( Q0 B% o& y9 L* k3 {
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the$ _7 y5 C5 C# I
- * GNU General Public License for more details.4 D3 l9 s: _$ T% [. U
- *; t/ q2 N" N. x+ @
- * You should have received a copy of the GNU General Public License- Y9 ]& C" C- @
- * along with this program. If not, see <http://www.gnu.org/licenses/>." Y" s2 a0 J. F
- *
4 y& K6 K* q: F4 s, q& Q e. N- Y - ******************************************************************************6 U7 g% L+ L! a) X0 R1 g. r
- */: a3 ], e8 |7 N
j) L. B9 z& U: x( {# H- /* Header includes -----------------------------------------------------------*/# b: h C3 [5 g, F& f. O- d' Y
- #include "RingBuffer.h"
9 _% B! v" `9 h' U* y) F - #include <stdio.h>- B3 I4 Y M; T# B5 `, q% j, P
- #include <windows.h>: W Q- ^$ l V9 S3 M* V& c% `
4 p% R. K3 v: |" Q- /* Macro definitions ---------------------------------------------------------*/
' W) |! W- B# i, ~2 ~ - /* Type definitions ----------------------------------------------------------*/
# {! V# z$ |1 F! Q4 q+ S" y - /* Variable declarations -----------------------------------------------------*/
+ l1 ~2 n9 z2 t* s - /* Variable definitions ------------------------------------------------------*/$ p2 Q- d E G- R
- /* Function declarations -----------------------------------------------------*/8 g% c( h7 H$ W
- /* Function definitions ------------------------------------------------------*/- D8 N9 k; `, v3 f5 v( U0 U
; K/ e; V" v! C- /**9 M6 f4 N% F! r$ U y& D7 y
- * @brief Main program.8 L, p* }' [7 H* j' j1 I( R
- * @param None.$ u: j0 n% @' U7 K4 B6 z
- * @return None.
' U$ n; ^, j/ B5 K$ v - */- G% ^' [ S6 p
- int main(void); i m4 Q: `. C- j; `! B7 w7 q
- {
" P" W$ r9 \: w, i- z. P% N - uint8_t data[256] = {0};
1 \7 c& |9 Q, z, w
7 g" H4 d7 A$ q1 [3 T7 V+ h$ C- for(int i = 0; i < sizeof(data); i++)# W- X; [+ J% Y# w& \& P3 ]
- {
; B* Z1 }- k" s3 X ~3 l/ Q - data[i] = i;4 `+ ?0 a |* o$ S9 ?9 Q
- }
/ L( r: N; v9 A3 O7 W% C% D! } - - H t# H0 J6 |7 t/ A
- RingBuffer *fifo = RingBuffer_Malloc(sizeof(data));
2 y4 N" S/ p% k, h b& d, D/ v0 L - 0 ~) _4 ~9 ~" {
- if(fifo != NULL)3 N, o( d$ F' Q, p7 W
- {# B) R! N9 h5 \/ x% t+ n
- printf("FIFO创建成功,FIFO大小:%d,使用大小:%d,剩余大小:%d\n",
7 @. K/ B# h' E6 ^ - RingBuffer_Size(fifo), RingBuffer_Len(fifo), RingBuffer_Avail(fifo));
/ q8 D0 W4 ~$ e - + B0 e/ F) k- r% X. z
- if(RingBuffer_IsFull(fifo) == true)
$ w0 ^2 D1 K1 ?: P# w/ [! J( p - {8 G0 g$ v) B* f5 m
- printf("FIFO满了!!!\n");$ _* q5 w0 E% F: @6 _4 h2 Q6 G
- }4 |- d7 c3 ]% N5 A
- else% W+ O4 t8 |* F6 H, T
- {- f8 t6 W9 `. t4 ^! S& X
- printf("FIFO没满!!!\n");6 o3 w' E# I0 w' Z9 Q2 j M$ s6 m
- }
# T9 m) D+ G/ A/ ` - $ N( |1 s+ b6 W3 u- h- F7 J
- if(RingBuffer_IsEmpty(fifo) == true) t+ S& |, L0 @3 i# d
- {
+ B" R2 o7 l9 o( T y4 M - printf("FIFO空了!!!\n");
. F+ ]- M5 B: l; N5 F+ `0 f - }
7 Q* p! H+ \( {5 F U - else
* J6 D) K3 w- W" J' f; v: m0 m - {: ^5 ]- P0 S3 }" K5 ? J/ c
- printf("FIFO没空!!!\n");# O4 `& U$ I* b
- }
' y+ Y. L9 p7 q5 s7 ]
" B; T! x% y; B5 G- printf("\n");. {( U8 Y* i* x( r1 Y: J( E
- " `+ G5 {' l& C7 y" R
- for(;;)
1 X1 u% N3 \( S# q0 w - {
6 x D X5 h4 t# i+ a3 l- B( @9 P( t - {
/ I; L$ X* ?3 D4 f6 w - if(RingBuffer_In(fifo, data, sizeof(data) / 2) > 0)5 L7 u0 ], b: f$ r6 l- Y! z
- {
& ~0 F8 Z% t- R - printf("FIFO写入成功,FIFO大小:%d,使用大小:%d,剩余大小:%d\n",
- i5 K' N: T1 R1 R* t4 U- P - RingBuffer_Size(fifo), RingBuffer_Len(fifo), RingBuffer_Avail(fifo));. |6 b" M5 s& D. ~5 f
- }
' P, A5 W! ]+ h3 X9 v! Z - else% a2 _9 l2 k# r; D" H9 T1 C+ ], [( ]
- {( f/ U6 H' R8 {. a c$ ]1 y3 \3 D
- printf("FIFO写入失败,FIFO大小:%d,使用大小:%d,剩余大小:%d\n",
( P4 b5 N) u! i8 I* s, ~9 d - RingBuffer_Size(fifo), RingBuffer_Len(fifo), RingBuffer_Avail(fifo));
8 [6 c# t6 Z, @0 T - }' B: F+ S& {4 O" Z$ g4 j
& s5 v' P# X! s0 K3 b) w) l- if(RingBuffer_IsFull(fifo) == true); V9 f9 X4 j/ y! L; l! i0 H
- {
8 W" w: O9 \; ^. O O - printf("FIFO满了!!!\n");6 G6 S6 f5 ~1 a L. v6 D- \ t
- }
/ o2 p, T- t$ j7 }; o8 R7 ? - else
! R0 u0 Z* ^0 s: Y& i - {
, ~" h9 w2 C5 k( Q2 y. L2 _! J( y4 w - printf("FIFO没满!!!\n");
, ^! m" c' \3 A2 D2 d' G - }
8 n+ X! N/ u/ s5 {
( R+ P% K8 c4 D1 l. A- if(RingBuffer_IsEmpty(fifo) == true)
* M; P6 I/ O( b3 {; k. R - {) J# D& r" U5 M( M& v, m
- printf("FIFO空了!!!\n");
! ^7 I' D. _' q7 ]( B - }1 K6 c& n' x( ^/ P+ Q
- else
5 }7 H* ?1 t+ x2 ]- | - {
/ p6 u( m1 ?: K& M, ? - printf("FIFO没空!!!\n");. T- {& t0 ]: _
- }0 N0 V, K9 K, ?! U9 F3 c, ]
- }
: ]3 x. ?# { d6 I- G
% R" H; J b4 l3 s0 s- printf("\n");8 U9 q/ X( b+ _
- Q5 _( }! C) H4 U5 o( T- {
0 O, e9 U& r2 R" D% ` - uint8_t rdata[64] = {0};8 `5 B, A' `- i8 Z) ?
- uint8_t len = RingBuffer_Out(fifo, rdata, sizeof(rdata));- G1 v; o9 J) k2 ?* a
- 7 I8 Q: e! \7 }0 d
- if(len > 0)
' E7 I+ b# c b/ y - {( D& u ]* @1 K' h4 s X f
- printf("从FIFO中读出的数据,长度:%d\n", len);
3 V: m9 F3 U, I- @2 W8 R- z
1 J8 t* r7 |0 n9 j% W; Q" y- for(int i = 0; i < len; i++)6 i' z& X" X' s+ s" ^
- {
- m. r) f6 D; V3 {3 x - printf("%d ", rdata[i]);3 k. n6 D9 y% O$ m) G
- }
+ U R5 L) d6 B4 r. w5 c
- j* k; b6 w k( M2 ~- printf("\n");
0 B1 P) G! m$ o( U1 w - : t6 d! ~, }+ Z
- printf("FIFO读取成功,FIFO大小:%d,使用大小:%d,剩余大小:%d\n",
1 o( D% ^* l. b1 u - RingBuffer_Size(fifo), RingBuffer_Len(fifo), RingBuffer_Avail(fifo));
; F. g0 B% }6 f& L, [+ s# s - }
1 h0 v9 ~- M+ B% P - else
' K. x/ w* t6 L' U J% V- \ - {
/ w: I$ ^' k9 `; C( i% a - printf("FIFO读取失败,FIFO大小:%d,使用大小:%d,剩余大小:%d\n",( F) k3 z1 Q/ w
- RingBuffer_Size(fifo), RingBuffer_Len(fifo), RingBuffer_Avail(fifo));5 \& [ V2 `% {. \: z6 \& Y% K7 ]
- }
3 c5 r: p4 t. n' a - $ l: s6 n0 g, X N' {
- if(RingBuffer_IsFull(fifo) == true)
) x: l [$ j4 j" B: O - {4 p7 E# R- A/ G1 q
- printf("FIFO满了!!!\n");$ M7 y+ w/ D; C1 Z$ v; R8 U+ y
- }
& k4 a" ?6 n! w% G O - else
& |6 v; w. A$ S5 o& b3 N - {
$ j$ z1 o, C H# A2 Z - printf("FIFO没满!!!\n");9 X* ?1 S# J- c
- } U8 u: Z+ d# r7 i9 V1 e
- 6 Z* i2 H" e6 w( h. e+ k/ v( h6 C
- if(RingBuffer_IsEmpty(fifo) == true), ~! w: Z# R# G7 N9 v, M. o
- {
/ E. i P& ?# ^3 G4 ^ - printf("FIFO空了!!!\n");5 @' E* j( P2 }" B: j$ K
- }' k5 S" ` K* |+ F+ s: I
- else9 |; ^) S4 {2 X- B
- {8 b0 }# ~& E! z1 D2 }
- printf("FIFO没空!!!\n");
3 w" D) i/ Z% o - }# {5 b Q5 N. G
- }
6 X9 w5 K6 Q7 E$ i1 x% V - 6 W. r; O" }4 w# n$ ]5 L W
- printf("\n");
/ c, i1 ~/ ]0 X- c0 p) p) p8 Z
7 g" x! E4 O: ?5 ~- {
* T& J& u& X* y" H0 E) Q# A - RingBuffer_Reset(fifo);& U+ a- n9 }( a+ R A
- printf("FIFO清空成功,FIFO大小:%d,使用大小:%d,剩余大小:%d\n",$ R; z! W& O/ ^- m! U6 _ o4 _
- RingBuffer_Size(fifo), RingBuffer_Len(fifo), RingBuffer_Avail(fifo));3 R: X! r% h: U% D
- 9 _+ o( J6 F7 K# k$ D: _' B; E) G
- if(RingBuffer_IsFull(fifo) == true)
c( q3 n* ]" E- a - {6 f9 O9 \1 b& N( T# M
- printf("FIFO满了!!!\n");/ }- S$ `% |' i
- }
) N# \' @4 X4 h& {, a; f6 ` - else
( X2 X# n2 J! k$ X$ c - {
" d' `7 C6 z4 x B8 B* I - printf("FIFO没满!!!\n");! t: h) \9 X5 R* K5 `7 i4 V
- }- {: I* ?6 V" J% q* l
- 5 U: X3 ^' V$ H" F: H' ]- C
- if(RingBuffer_IsEmpty(fifo) == true)
) H* _# N; P+ p6 X' H& t$ _ - {
" d) r, D' @0 m) U) d2 f1 x+ D" U4 ? - printf("FIFO空了!!!\n");: s' E% u6 v f' H1 H3 e( t0 G# R
- }5 F% b% L" j+ m8 V4 P, Y% I
- else5 f3 n! p I! M" T3 J
- {
1 k4 [) Z* Y: B! U* Q( s - printf("FIFO没空!!!\n");
; I. w' Y0 }" W9 v - } g% \: r! f" X' T2 [
- }: e9 l3 ?0 A0 `$ L! ^( g
! }# i: B/ M' }" z3 B: k- printf("\n");4 i5 l2 f0 J; I J
- 7 X4 R4 j5 a) Y& r! P
- {% U$ {' b) ~8 K( S1 n3 l/ |
- if(RingBuffer_In(fifo, data, sizeof(data)) > 0)
. ?' H2 B. z3 A) B5 X - {
: Y# S; Z7 H+ m* O - printf("FIFO写入成功,FIFO大小:%d,使用大小:%d,剩余大小:%d\n",
5 `4 {- R8 z, k% D8 t - RingBuffer_Size(fifo), RingBuffer_Len(fifo), RingBuffer_Avail(fifo));
3 o3 s) U9 w9 ] - }
3 [" P3 F; N) q& B' d* q l - else! o! v+ o4 N" v. n" v
- { m$ Q) E) U4 n: M9 c
- printf("FIFO写入失败,FIFO大小:%d,使用大小:%d,剩余大小:%d\n",, y6 n' S. s3 u, {# L
- RingBuffer_Size(fifo), RingBuffer_Len(fifo), RingBuffer_Avail(fifo));) T4 a% ]) P& J5 W( Y' k
- }& }9 Y3 B$ d5 Y5 k8 |
6 K# g; w0 b! B9 a- if(RingBuffer_IsFull(fifo) == true)4 m4 T# M6 _/ R& J0 ~
- { X, g* `3 [, f1 t {# b6 i
- printf("FIFO满了!!!\n");4 [" _. e' q* [1 g' J/ ]; n
- }+ Y% q9 ~8 |; ~9 x+ G X* h; t5 I
- else
& F {' N% S$ n) `& } - {; {, c4 [! }. Y, e7 c
- printf("FIFO没满!!!\n");3 Y7 P1 Q$ ]2 h6 R* t# k
- }
J. H! ~& @# Z b
, o4 Q) V5 \0 i$ [5 H# ~' r1 ^- if(RingBuffer_IsEmpty(fifo) == true)% n' E" ^, v* G7 y
- {' ]$ e, k( i. E9 T" s: x5 X- S
- printf("FIFO空了!!!\n");
$ h) b0 L9 Y. ]1 m+ ~. R, `0 _* S* c( v - }' f9 O* P! @. [; o6 H, R' K
- else
1 B3 T; w" z n - {) _6 P; O- j, H
- printf("FIFO没空!!!\n");
% Q* E! ~1 m1 O) k3 |1 R - }0 }+ q1 `# {2 |% u/ n
- }3 Y/ h" d+ j+ R7 S% L; y
- 8 A0 C. l2 W; I& \
- printf("\n");6 U: p. q* z7 n& d' x6 X, s
3 `! K- |8 f6 O& c; H- {7 \, M/ R, T- K5 |4 J
- if(RingBuffer_In(fifo, data, sizeof(data)) > 0)
: n4 Z) z; ^! T" K0 R* g: p - {+ X( X/ L/ L* o* B1 [$ o
- printf("FIFO写入成功,FIFO大小:%d,使用大小:%d,剩余大小:%d\n",1 z" |/ h3 w$ W/ s3 n5 _
- RingBuffer_Size(fifo), RingBuffer_Len(fifo), RingBuffer_Avail(fifo));$ M) [9 ]. p4 N6 V3 D
- }
3 _& E, P' {0 E% b" N0 q - else
! G5 @6 t" W4 |8 a* a0 s$ x - { s" r/ D. t4 i7 ]5 I& a& q8 @$ n
- printf("FIFO写入失败,FIFO大小:%d,使用大小:%d,剩余大小:%d\n",
0 q+ p* G p; O: }# q' Z - RingBuffer_Size(fifo), RingBuffer_Len(fifo), RingBuffer_Avail(fifo));" |% t0 l% L4 s Q' x; s, b* L
- }3 k: M) l0 x/ M
7 e& N3 F5 V3 L- if(RingBuffer_IsFull(fifo) == true)
0 N+ D- F; Z. M4 ^7 L+ C Q5 P - {- Q* g3 W# a9 M6 i
- printf("FIFO满了!!!\n");
5 D& a; g2 q: I, ?& D - }7 `! f' P6 M' a1 i. i" N$ F6 j
- else( b" T7 @1 v) y- D A$ D
- {7 U4 g" {8 \/ }) J4 b
- printf("FIFO没满!!!\n");, m- Y) ]1 A, { S3 O- d' Q- o
- }
- x7 p- K, W4 k/ k7 J
# `* \% q7 T+ A* o1 h- if(RingBuffer_IsEmpty(fifo) == true)
+ g1 z' ^4 R3 C$ c) k - {
! R6 o9 o ^2 K' T# G6 @ - printf("FIFO空了!!!\n");4 H4 H: x- H- ~9 s6 o
- }+ Y4 C, K3 X7 z5 Q. y% B
- else8 _" \" \( E, {% J1 F% I/ Q# y
- {
9 s" y+ b8 E a4 R - printf("FIFO没空!!!\n");* Z2 h% U7 v7 I3 q8 c* |
- } i+ C" b1 v4 t( V9 H1 ^6 m& `
- }9 r7 }0 k" l% x: |- x# t; G" F5 s
* y/ `7 F5 Y% ]( f- printf("\n");$ e$ h6 Y( `0 H& z: k: A; G
- 8 I8 B: n0 P6 H; W# S
- {
/ [- u3 J1 G! y- e - uint8_t rdata[256] = {0};
5 R( f1 e1 ?* F0 E - uint16_t len = RingBuffer_Out(fifo, rdata, sizeof(rdata));
. n1 [6 f- {8 b x/ ^- K - " U; \! a+ c, @5 a) V0 i4 c
- if(len > 0)
7 N' q* C; b( k - {
6 T% q, J1 Y7 Q! w- l - printf("从FIFO中读出的数据,长度:%d\n", len);
8 O- ~1 d* t2 P1 \5 A& O- Q" D' N
4 |* j* B- p7 _7 _* A- for(int i = 0; i < len; i++)
# ]( Y6 q' e" B3 r* h1 M# @ - {
& w; v: V! G, | - printf("%d ", rdata[i]);- {) Y9 h/ _6 S" X. g) O' m9 Y3 z/ Q/ f' K
- }" U' g6 o( Y! h/ d
* L6 {& H* H( }- printf("\n");, x" [2 L0 {- S8 G
0 m# k: q0 ?+ n) p, u" X; @- printf("FIFO读取成功,FIFO大小:%d,使用大小:%d,剩余大小:%d\n",
$ x! Q6 B/ x* c - RingBuffer_Size(fifo), RingBuffer_Len(fifo), RingBuffer_Avail(fifo));. B6 M' Y" X4 Q+ b0 V
- }$ {& j" y( O0 v6 {1 r, m) z
- else6 p6 L) h$ D4 j( X* U& q5 Q2 Q
- {
% x! O: y6 [8 g$ d1 z - printf("FIFO读取失败,FIFO大小:%d,使用大小:%d,剩余大小:%d\n",
/ I; D% A0 r% O* n0 S# n - RingBuffer_Size(fifo), RingBuffer_Len(fifo), RingBuffer_Avail(fifo));, S" p: D2 \! W+ g$ K C2 P- d$ u
- }
0 S& Q& J* `; I4 h: y6 X - 8 q2 s7 o& Z- H
- if(RingBuffer_IsFull(fifo) == true)
3 V! a: A/ ` _& h* U0 t - {! F. H# {% y8 H) Z
- printf("FIFO满了!!!\n");- T* s7 R7 I' K
- }8 i- i) ~* r0 G9 @/ s0 n
- else
2 f3 g8 V. F, d, O) ` - {
3 u2 l5 S; o3 \! Z( Y& @ - printf("FIFO没满!!!\n");7 t2 P& C H( ^( H3 V8 W9 \
- }: V, I0 E* n W' P- T/ U" j
- 8 w- R1 R: Z. b4 E3 R
- if(RingBuffer_IsEmpty(fifo) == true)# q+ w+ c# y6 l. H: j! @) k
- {
: Q& v' T7 f- h; Y- ]# n( K - printf("FIFO空了!!!\n");
b) `, K! m6 ~1 ?8 e' j$ i - }
& h2 y7 w- q) H) D5 E - else# y. F: m+ l3 F- Y3 H2 e, M' F
- {6 E; _5 p: K- m1 p# j& _# @; x
- printf("FIFO没空!!!\n");
8 z _% V$ b) `; p" Z - }& J5 {- |8 F" W
- }2 q8 h, u+ X& v
- 5 C2 {9 L% ~1 q3 D
- printf("\n");
8 o; B! z, ?* ?. i: O; P! G4 B b
9 J4 c: x6 M9 s/ i! l1 X2 v- {
% Z" ^! _+ `* i0 S$ K+ G - uint8_t rdata[256] = {0};
3 ?- i4 j) h4 E: ?5 I ] - uint16_t len = RingBuffer_Out(fifo, rdata, sizeof(rdata));
, J; G4 B0 f5 ?/ N7 A5 [
8 p) B6 E. S0 f: P- i- if(len > 0)
3 U S; U! y0 t3 \/ ^ - {% Y- j! o- b2 i0 k# q# n
- printf("从FIFO中读出的数据,长度:%d\n", len);7 C6 ~5 d% a9 Y2 R5 m
. M2 g1 R! r) u* q' d. L( s- for(int i = 0; i < len; i++)9 Y: r; N# G! s/ q9 O7 o/ D
- {- ^4 ^7 a4 T8 w. W
- printf("%d ", rdata[i]);3 f3 i5 m! a1 O' e }9 ?
- }
% \; j3 X3 P2 C - % L# l9 j/ {& e/ w+ n
- printf("\n");! m6 `) _* @" X" X5 s
- 7 b7 @7 k! g4 X9 T) \6 i' o
- printf("FIFO读取成功,FIFO大小:%d,使用大小:%d,剩余大小:%d\n",
/ t4 Z4 T1 G# @* d& }9 i9 D - RingBuffer_Size(fifo), RingBuffer_Len(fifo), RingBuffer_Avail(fifo));( l% O+ R- V2 E. x
- }
2 P) O' o( G R i$ W' v3 s - else5 _' I. p4 U9 l4 w/ o/ q9 K
- {" f" y4 z. N1 ^' m" }& K. M2 D
- printf("FIFO读取失败,FIFO大小:%d,使用大小:%d,剩余大小:%d\n",
# n2 z# |6 C0 G6 c6 ?4 V) R - RingBuffer_Size(fifo), RingBuffer_Len(fifo), RingBuffer_Avail(fifo));
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- if(RingBuffer_IsFull(fifo) == true)
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- printf("FIFO满了!!!\n");; ^) z" X. K0 x6 T& O
- }. Y5 l4 O. L7 Q4 i: h& o
- else
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- printf("FIFO没满!!!\n");: K9 n& K3 k* p) w& H9 P( O! I
- }
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Z9 Y1 N2 w7 l- t& g2 K' ]- if(RingBuffer_IsEmpty(fifo) == true)
# R& a- O7 [0 y$ b5 D# Z - {
/ f. I, |' U* L6 B, p" P* x9 K - printf("FIFO空了!!!\n");
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- else. ~) [" e6 ^0 B+ c# ?: n, P7 ]
- {
5 Z9 B1 M9 [1 f8 I, \: D - printf("FIFO没空!!!\n");- Q4 i2 P' o: O$ G% O0 |! O: B( ^
- }
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- 2 f# Z! k6 [* A: N* D
- printf("\n\n\n");
. }) `+ ]$ e, N$ M4 o/ m& h - Sleep(5000);
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- }
& r# @) Q8 W. s+ l/ q/ G2 u - else
3 ?3 n Z# Q$ A - {
. {' V$ F( E4 j- j: m* ?/ \ - printf("FIFO创建失败\n");+ r* c$ r% M5 {! f9 ?
- }; w( o, `% E# O2 Y
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复制代码
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GitHub仓库:http://github.com/XinLiGitHub/RingBuffer
kfifo 可以实现,一个线程写,一个线程读,不需要任何的保护。无锁编程才是他的精髓。
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谢谢分享
以前搞过ram模拟fifo,还没用过环形fifo,学习学习。+ Z2 T) e- p" k! D
谢谢分享,学习了
巧夺天工的kfifo(修订版)
可以去GitHub,有完整的工程。
亲 可以给个链接吗