模仿kfifo实现的环形缓冲区
* L; a. h$ `; }1 g4 m3 |5 a% q' A 3 I. A) l6 i& |( J0 G6 A( ~" V
9 M: ~$ Q8 t) m" ~转载来源:模仿kfifo实现的环形缓冲区/ \" r2 B2 O* K9 T0 m' j' J4 q$ X
& O4 p. h, p5 d: b' V: e% p
& K7 T! Z- P; R& _: H) JGitHub仓库:http://github.com/XinLiGitHub/RingBuffer: D; e$ z/ ^8 g4 J9 V7 p
PS:博文不再更新,后续更新会在GitHub仓库进行。
. L( K+ |; E4 }4 f- d4 `6 K& T7 v \5 c
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)。/ j" p$ p) s6 a! L8 T% A. }2 w+ e
$ w l: l- }: u8 N/ C1,开发环境
) p: c, {3 `" I- Q6 e n 1,操作系统:Windows 10 专业版
4 E( T6 L3 ]1 G' e 2,IDE:Visual Studio 2015 专业版
. D8 m S0 V; T0 `& ~9 I) d4 }% B
% H2 w* K" H) A2,程序源码
1 G) ?6 u7 C9 Z3 Q$ o+ c( v- z% ] RingBuffer.h文件2 t$ u0 T0 K6 O( I2 J
- /**
! Y2 H3 B* \) M, J - ******************************************************************************7 ?& h. Z! I7 L/ m( o2 }9 v9 \1 b
- * @file RingBuffer.h* A( G- y; G5 G# o* f
- * @author XinLi; @- p+ X6 C" N
- * @version v1.0
% @* S! |' w0 Y) j! P8 T - * @date 15-January-2018
h" K% u1 L9 W- b& U - * @brief Header file for RingBuffer.c module.# }, h3 J9 A9 [4 t W$ M0 h( Y$ e7 }
- ******************************************************************************
) l) R* n5 r) F T! J3 V - * @attention- E* \3 L/ {# i1 V5 y# t, F
- *
6 J, N. F S* K7 N2 n) t" P - * <h2><center>Copyright © 2018 XinLi</center></h2>6 q9 I! ~0 `% s/ ~- T
- *
( C& u( I: j+ i - * This program is free software: you can redistribute it and/or modify$ W' o$ }. N( Z
- * it under the terms of the GNU General Public License as published by
, @8 s5 t8 }' S; W - * the Free Software Foundation, either version 3 of the License, or" d x/ M+ B( h: V# ]( I7 Y" h
- * (at your option) any later version.2 m* }7 s9 Q4 a" J3 j
- *3 |& s( I. H; z3 p/ G2 m
- * This program is distributed in the hope that it will be useful,9 ]# F2 w( a! V7 X3 {3 J, y! C0 p$ a
- * but WITHOUT ANY WARRANTY; without even the implied warranty of0 S' J# K- i1 h2 E: r3 S: e
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the' e7 P3 T$ e: _- ?3 B7 J
- * GNU General Public License for more details.! z' x' o1 H2 w& x& M! w6 c+ ]
- *
& S+ n2 u7 S. _0 B- B - * You should have received a copy of the GNU General Public License
( N- L* c$ b7 E/ G - * along with this program. If not, see <http://www.gnu.org/licenses/>.+ p. t, H2 }4 k8 [2 b, ~
- *
$ r. m; ~& Q, n% ^ - ******************************************************************************
3 D3 G' b7 s/ f [ - */
# } n" y8 O3 T/ V8 e! C* b
# R6 i/ u. o. v9 G- #ifndef __RINGBUFFER_H- {$ l1 a4 D- Z j, \5 ^0 T
- #define __RINGBUFFER_H& l _& O( ]0 u3 c
9 Q7 J& K+ B" g8 ?4 X3 y5 x# W8 i8 p- #ifdef __cplusplus
" N: i. ^+ A M; K - extern "C" {1 D9 ~9 Z3 f. }1 A# h
- #endif
+ r0 ^6 _; E" W6 Z( q7 i% w' u - 6 G9 g2 T, Z* f/ x# {% Y* W
- /* Header includes -----------------------------------------------------------*/
$ p$ K: L! }1 z, p2 C) x2 L - #include <stdint.h>: w N2 h6 N8 l2 k. J5 P$ A
- #include <stdbool.h>% w! p- D+ r8 H# I2 X1 y' _) g
- / X! V8 f+ ^# P6 v8 Y
- /* Macro definitions ---------------------------------------------------------*/% V9 t' f/ [$ y' L
- #define RING_BUFFER_MALLOC(size) malloc(size)
" `. ]; B, O+ Y% ?0 C- P2 F% l2 _ - #define RING_BUFFER_FREE(block) free(block)# r8 d+ i( j5 a; a) R3 T: H
$ U) [1 [" x, N( y5 @% x- /* Type definitions ----------------------------------------------------------*/
1 O+ m4 H- p( k; P - typedef struct7 B8 E1 E5 z( P+ w
- {2 |) F* Q. {9 G, l& v3 p* M+ F9 |
- uint8_t *buffer;
; o8 \( O" j) J- L/ x7 I - uint32_t size;
; s; R- ?/ p2 y$ N3 p6 j8 N+ o - uint32_t in;
4 r t$ s) y/ j1 u* F2 U% o4 v* a k - uint32_t out;8 S+ H2 b) U+ I9 b7 K
- }RingBuffer;5 W$ U% r+ b- ~% i! P& Q
4 I1 @ P0 d" `4 ]- /* Variable declarations -----------------------------------------------------*/
6 V" u9 m: M0 X/ U! C% c - /* Variable definitions ------------------------------------------------------*/
: x2 a$ \# ^2 b! w2 z9 \; F: N# F0 m - /* Function declarations -----------------------------------------------------*/
* x% p- V; j0 R! C4 ] - RingBuffer *RingBuffer_Malloc(uint32_t size);
[6 `8 {7 c# f - void RingBuffer_Free(RingBuffer *fifo);1 R9 D B# Z) M' j+ Z$ \
- uint32_t RingBuffer_In(RingBuffer *fifo, void *in, uint32_t len); K4 y3 U% `$ J, W+ j2 [, l
- uint32_t RingBuffer_Out(RingBuffer *fifo, void *out, uint32_t len);
, h0 E3 Z' _6 n; n! X! u/ J
& q- W7 I- k2 x8 h6 W+ b# u- /* Function definitions ------------------------------------------------------*/9 U: s. a, `/ o! x' _
- 9 v0 y0 Z. v$ F+ V
- /**1 T. ~4 I/ x) B8 y
- * @brief Removes the entire FIFO contents.) g. s" L8 t/ t, ]7 }9 y
- * @param [in] fifo: The fifo to be emptied.* V" C1 a$ }% s' ?
- * @return None.4 M# h; e9 F5 f+ B% r; ^0 J6 T
- */
0 B& Z6 K8 O% g+ d - static inline void RingBuffer_Reset(RingBuffer *fifo)8 D' ^: n' X: ?& _
- {4 l4 J' u* y2 d6 T8 B# \% k6 |
- fifo->in = fifo->out = 0;( P. z5 p. A$ \% f- q" ]
- }1 G) K& n) O2 g3 y+ _& L
- 8 E+ \: e) Y7 @2 H8 v7 ^! ~( l
- /**
4 b2 v2 Y9 x& E) ~ - * @brief Returns the size of the FIFO in bytes./ i/ d# G. E6 A/ n, Z6 R& m. q
- * @param [in] fifo: The fifo to be used.. R, s) W K9 J9 m
- * @return The size of the FIFO.9 s8 J% P& {/ v; g0 f d6 v9 B
- */+ d; A) m+ x8 A: _
- static inline uint32_t RingBuffer_Size(RingBuffer *fifo)
$ ?, w, o/ }! E' e4 \* a/ [# I - {
0 p! a1 Q! C* e4 Z- Y$ i0 Q - return fifo->size;
% ^! t, ~7 M) {$ ~" a( @ X4 _ - }
3 G" i2 w. `5 W7 d+ B0 I
7 W) s8 K) r4 s- ]$ s8 u ~- /**( q- g+ T8 u# J8 }6 }
- * @brief Returns the number of used bytes in the FIFO.
; `/ f! \. _6 T) f9 L - * @param [in] fifo: The fifo to be used.( R0 ?8 f* t$ N3 V/ I
- * @return The number of used bytes.
/ u3 z% [1 {& n' I2 w+ K. N - */ R$ R' S9 E& `
- static inline uint32_t RingBuffer_Len(RingBuffer *fifo)0 q- o' Y) P: r# g* y. v2 L) x ]
- {
: n) \. ~% S( t- n% F; H0 u' [) R - return fifo->in - fifo->out;
! V: r: s# p( Y) t& F - }
( }* T% Y4 ~% G V
1 s5 K5 m5 m, \% G/ A# m0 a- /**
+ G2 ?2 D, t- X3 K - * @brief Returns the number of bytes available in the FIFO.- ?. o' O O/ W$ X) a" Z
- * @param [in] fifo: The fifo to be used.4 Y& M& c( ^* q: h _
- * @return The number of bytes available.
$ }6 R1 ], {6 e. O: v* \ - */
6 y/ }" Z; Y' o; z' z8 X; m7 P# T& } - static inline uint32_t RingBuffer_Avail(RingBuffer *fifo)
F6 G9 i. E7 I( X: w% L5 G0 V1 V - {
' D$ |. V$ t# j ` - return RingBuffer_Size(fifo) - RingBuffer_Len(fifo);
+ m8 z; f8 R: ^2 i/ i5 f - }
- _* K* R4 I3 I3 t: ?" f
, Q3 S9 ^ D( j# j4 o' B- /**
5 [$ D( L' y3 d+ y- o3 v - * @brief Is the FIFO empty?
" U3 I7 D* [0 K% F2 f - * @param [in] fifo: The fifo to be used.1 U- V F( Q* x9 [
- * @retval true: Yes. _0 K7 ?0 l7 {" t5 w
- * @retval false: No., W$ [9 c" O C" @8 S
- */0 y9 G! Z. C( S- s. O; r O
- static inline bool RingBuffer_IsEmpty(RingBuffer *fifo)8 Y2 E9 Y9 c* |9 L, T1 J( m
- {3 U0 z) V' U/ x
- return RingBuffer_Len(fifo) == 0;! y' I5 k0 A7 a0 g
- }
' n% b' L4 e+ q I5 o - & |& }7 ^5 f% L1 j2 [0 _8 Q& o" M, d
- /**8 e+ g( Q. w! C. |' j
- * @brief Is the FIFO full?
' N8 _, k8 ]; G! z - * @param [in] fifo: The fifo to be used.
' b5 `7 ?4 V6 q - * @retval true: Yes.. y: E6 | ^& i! Z- |: @+ q
- * @retval false: No.
6 D% e& C7 J" s - */* g, e2 J% D% H2 k. b: |
- static inline bool RingBuffer_IsFull(RingBuffer *fifo), e. C4 J: i5 k$ t$ y, j
- {$ l# A/ }0 n& R" k
- return RingBuffer_Avail(fifo) == 0;6 }$ a9 B. q" u$ n+ l" u+ v) F8 W. o
- }% v3 h4 ~. {( W' E* v
4 M3 x8 H" s, \ Y- #ifdef __cplusplus
9 \- |& F7 h9 t8 n - }8 |6 d; c: X/ \ Q9 c' p6 p
- #endif
5 |4 X3 O; {0 b R1 o
* _& S6 W, q: J9 v7 b3 b- #endif /* __RINGBUFFER_H */* v1 u6 K. Z3 R% N& m7 {" u
复制代码 " w) l" E& J/ c, k4 q; }0 H
RingBuffer.c文件+ |: i9 M4 L3 l4 `9 | Y3 L( t
- /**; U8 k$ {7 s8 i/ n- p
- ******************************************************************************( w4 r, X6 q9 w& ^3 d* _
- * @file RingBuffer.c7 f- P1 @1 j0 N }% g" W
- * @author XinLi a' J; |) D2 m7 C8 r0 Z# G8 a
- * @version v1.0
& ^+ z7 j6 v. ?5 [* x - * @date 15-January-2018
) t" W' b7 p/ h" A& M6 Y! M8 b - * @brief Ring buffer module source file.* B1 X% e# k1 n1 Z5 A
- ******************************************************************************! ^6 N- R) N( U% ^" ~6 f, ]
- * @attention
5 n9 U6 q3 a, ^/ } - *
. R3 R4 y7 x1 e' I; b4 U/ H" s! d& e - * <h2><center>Copyright © 2018 XinLi</center></h2>
9 @9 Z+ k4 o3 Q2 N - *
l9 Q" i, ^3 d. k) [ - * This program is free software: you can redistribute it and/or modify
X# W& S$ u, q6 d* a! Y - * it under the terms of the GNU General Public License as published by
2 z; F% ]/ ^$ U' h0 m% I8 a - * the Free Software Foundation, either version 3 of the License, or
9 N/ i- m8 H; `" T - * (at your option) any later version.! Q8 k* T" R6 O+ P a, [
- *, U7 N6 @5 n+ [2 Y8 I
- * This program is distributed in the hope that it will be useful,5 [1 p( ]# t2 i4 I/ G4 N( @
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
6 X& l2 l: _' ]9 t2 U3 F* K - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the7 w+ `- F+ Y) {2 A8 \' ]8 @
- * GNU General Public License for more details.0 j; B6 r& }: K1 l0 {
- *! B R5 U( I6 y. e3 u. e, C- Z
- * You should have received a copy of the GNU General Public License# \& u( u0 q0 P) S! Y/ w
- * along with this program. If not, see <http://www.gnu.org/licenses/>.
* U8 i( o6 H: h1 j9 U, N5 M - *
: i- Z; B0 t1 g H - ******************************************************************************9 Z4 z$ \* q9 g& S; b" `/ Q
- */7 x1 l, n0 S9 h [
7 a( V# B% B. Y" X$ y+ \5 q- /* Header includes -----------------------------------------------------------*/9 D% c$ D& D1 C
- #include "RingBuffer.h"
( o) Q W1 _; m - #include <stdlib.h>
& P4 M/ A( g" T( b' W1 b3 N% ]6 R - #include <string.h> j7 j6 m& _7 i7 w( o! |3 \' M
5 x) k$ J+ x, `% w: Z" _- /* Macro definitions ---------------------------------------------------------*/
, H: o1 j7 K9 }3 N - /* Type definitions ----------------------------------------------------------*/
, L$ w: g# Q0 o2 I - /* Variable declarations -----------------------------------------------------*/
( D5 p& K2 k q4 m: r - /* Variable definitions ------------------------------------------------------*/" t, L# x' r1 _, y& H
- /* Function declarations -----------------------------------------------------*/7 G0 e/ L% \ q" @1 |% H) q, B( a# j; q
- static bool is_power_of_2(uint32_t x);
* L0 Z5 P" k( ~ - static uint32_t roundup_pow_of_two(uint32_t x);
6 y$ e( r$ Y+ r( t B7 W: q8 u
8 V i% U, F5 ]+ e- /* Function definitions ------------------------------------------------------*/! h% u# C3 J9 _3 A _9 R
& R! T4 S/ j y* p8 a W- /**' }- z9 L4 s% L5 {3 _6 b
- * @brief Allocates a new FIFO and its internal buffer. Y$ @+ p/ [. J! D- P8 M' _
- * @param [in] size: The size of the internal buffer to be allocated.7 r' L0 I W& N( T" \" ]9 Q8 c
- * @note The size will be rounded-up to a power of 2.2 S- Y; a$ D- w! ~4 l+ W
- * @return RingBuffer pointer.
) d& z: ~2 B( c. g. M' I - */
2 O, Y* q' Z3 b0 T) G) U - RingBuffer *RingBuffer_Malloc(uint32_t size)
* V7 } `, g/ ~+ ]8 J - {1 ~" i. G; o. F: M" C; b6 X! c+ N
- RingBuffer *fifo = RING_BUFFER_MALLOC(sizeof(RingBuffer));2 E& M( }% q4 \8 n; a/ c
- ; l, d% N+ f1 N& r
- if(fifo != NULL)' W) u! T9 v& c" v* Q
- {) s4 s3 G% |# U, ]$ S! f
- if(is_power_of_2(size) != true)2 ?- z- [3 [- b# W1 w! r [
- {; W$ s% L. Y, ^% S% t
- if(size > 0x80000000UL)
8 u/ W' n% U2 }( e3 H7 m5 I! v' q - {1 w7 G9 ]0 q9 P2 r7 Q
- RING_BUFFER_FREE(fifo);
" J( U5 ?: W) B& {' { - fifo = NULL;
$ [- {+ b1 `9 Y7 ^ y* ]+ g - return fifo;& s7 }. B# H4 Q4 s: @: e$ j8 G
- }* W. o- M3 f" p) a* H" Z$ L
- 2 }0 g" N* z$ w+ @5 S
- size = roundup_pow_of_two(size);
+ e& Z c" M0 U" Y% _( _ - }
% b4 h2 P- Z0 Q; t3 g
6 O8 _9 h5 q+ X* G# T V- fifo->size = size;
2 M8 a# Y5 o8 b( ?# d5 r - fifo->in = 0;* J( A/ Z [7 _1 a- J7 C
- fifo->out = 0;* i$ ?) _4 C& D
- fifo->buffer = RING_BUFFER_MALLOC(fifo->size);) m1 M" N3 z+ w1 ?
- 4 _; t3 O4 S) ~3 m1 j/ V
- if(fifo->buffer == NULL)
' B2 A( w! M. l# s U' d - {8 r4 t' C: \# u; B8 c
- RING_BUFFER_FREE(fifo);
( Z9 B* T9 m+ F0 l; Y' ? - fifo = NULL;+ F/ H8 ^; Y% b& h( T* @
- return fifo;
' S7 D. g8 u* S/ r/ F6 ^; ^ L, ? - }& o6 H! D. B/ [& A( ]
- }# {1 X1 j7 W4 k
. k2 e) r* S" d/ W- return fifo;. y% j- d1 G' ] a$ H
- }
5 O; k5 P" ?: k! D" P& y J+ v* T - . z) q; l- u3 A- Z
- /**% D1 I- e9 K, V" u8 T
- * @brief Frees the FIFO.
2 f. M) e, q* w2 E8 c W7 m - * @param [in] fifo: The fifo to be freed." G# B* C; g+ ?
- * @return None.0 G8 _& V; X4 G s; @
- */
( W& M* F' [. H9 p) Z - void RingBuffer_Free(RingBuffer *fifo)
/ Q4 O. j/ r" F3 F q9 |; k6 O3 Q - {
4 B6 H6 e: q% C% M. \ - RING_BUFFER_FREE(fifo->buffer);, m6 b! i& p% S
- RING_BUFFER_FREE(fifo);
& j+ T; _4 m" A' p. b) B - fifo = NULL;
, w8 v8 |# P, R/ K- G( O6 X - }
5 i+ ?, x$ u' L" b5 M1 j
6 o( C. l; v$ N- |+ d* D- /**
" X/ E5 f8 ~# q, ?0 y4 J - * @brief Puts some data into the FIFO.
, H `7 H. x3 V6 H( P4 i - * @param [in] fifo: The fifo to be used.
9 K- _* t* P- e/ f - * @param [in] in: The data to be added.% T1 [7 T" B x( f: h
- * @param [in] len: The length of the data to be added.
3 E! U/ A( j# a0 E; i - * @return The number of bytes copied.
5 b' ?" W( j3 B, l4 V; G/ d& W - * @note This function copies at most @len bytes from the @in into; o9 \, n* n" V! h& j' ~3 q
- * the FIFO depending on the free space, and returns the number
' }, K9 F/ a+ o& M' c) R4 m - * of bytes copied.
4 m7 @5 v/ k7 C& {# \) e2 X; E/ \4 H - */8 t# Z( P; S7 ?
- uint32_t RingBuffer_In(RingBuffer *fifo, void *in, uint32_t len)3 V# B+ U+ f0 |7 H& r
- { I; ^. ?" B5 r6 e+ {! @) i
- len = min(len, RingBuffer_Avail(fifo));+ m5 h1 E8 Z" u1 M h- q1 w
, D9 D6 t7 O$ N5 A; F( A- /* First put the data starting from fifo->in to buffer end. */
* s3 b8 l- |( T0 P- I - uint32_t l = min(len, fifo->size - (fifo->in & (fifo->size - 1)));
0 s/ y1 N/ T }- {" O8 h3 T( @( I - memcpy(fifo->buffer + (fifo->in & (fifo->size - 1)), in, l);
* L, u3 K' R b0 W - 0 K' l& ^. J! H& D
- /* Then put the rest (if any) at the beginning of the buffer. */+ X0 y: z$ H6 K7 v+ Q1 _
- memcpy(fifo->buffer, (uint8_t *)in + l, len - l);" }$ ? |4 E8 C1 \5 s% e
) i6 F6 Z- n' y, V7 W- fifo->in += len;
) n) n( l" {, R. ^ v& E0 b - . `* A4 Q& e( R |
- return len;
. h& u' ^4 R, n - }4 S1 f, O! [3 ~6 k. \) p Q
3 r6 L/ O. q0 l; z- /**, H9 L0 t& w$ A
- * @brief Gets some data from the FIFO.; b6 _0 n+ @% O7 l+ S
- * @param [in] fifo: The fifo to be used.. @5 e/ E0 e2 Z( Q" U
- * @param [in] out: Where the data must be copied.! Z, ]$ P: e7 ~
- * @param [in] len: The size of the destination buffer.6 v/ Y/ q1 h- c) o# t j
- * @return The number of copied bytes.# ]3 `4 W2 J {7 r6 e
- * @note This function copies at most @len bytes from the FIFO into4 D. f- V. D4 W) H; B" L( E; P h( D
- * the @out and returns the number of copied bytes.* n% {* A6 p, T' a, R$ j
- */
& [" W) }4 a( h - uint32_t RingBuffer_Out(RingBuffer *fifo, void *out, uint32_t len)) P' U9 s" J, c. h# {' m: u
- {& R: v$ J2 c0 g. h1 s# v
- len = min(len, RingBuffer_Len(fifo));& x7 ~: ]3 Y& G7 ^) \/ P
- - U2 |+ t4 a- Q, } }" A
- /* First get the data from fifo->out until the end of the buffer. */
1 @9 D' f& q! n/ h* f$ o - uint32_t l = min(len, fifo->size - (fifo->out & (fifo->size - 1)));6 n a4 U1 t/ m' u6 d) H# T9 u i) Q
- memcpy(out, fifo->buffer + (fifo->out & (fifo->size - 1)), l);3 f. S* r) C4 g0 ?: r
- * q+ i( s5 y; r
- /* Then get the rest (if any) from the beginning of the buffer. */
0 |& ~! h9 c- V- ^' e - memcpy((uint8_t *)out + l, fifo->buffer, len - l);
; O3 f- m) j4 d6 l
$ ~+ J' _1 G" P5 E6 ~6 o- fifo->out += len;8 f/ L* P! Y3 T) E; u/ Q
- R3 T- e+ K; F( n' x$ _2 q0 ~5 b& N- return len;
$ G2 u- i/ w# I5 s t - }) R7 i; m" J, y& a# R6 }% r& s' O
- 1 N% P) s/ w7 B j1 L- _+ q
- /**
1 y+ R9 n4 }* O+ r+ t9 K; v( s - * @brief Determine whether some value is a power of two.
( x9 [' ]7 ]1 R6 n) a - * @param [in] x: The number to be confirmed.
2 [7 Y9 Z E2 W5 A* p - * @retval true: Yes.$ r, B; o& l% D& v+ S4 z+ O. ]! j
- * @retval false: No.
* @6 w( |+ C* W( A) F3 b1 v - * @note Where zero is not considered a power of two./ d6 N9 C I( q3 d
- */; J* W! R, L! z/ y7 \
- static bool is_power_of_2(uint32_t x)( O, {, v5 B, ^' y% b$ b2 q; c
- {4 x9 m6 E# }6 _& q. ^5 C
- return (x != 0) && ((x & (x - 1)) == 0);* ?0 l' }' P# A* Y% G; A1 j
- }3 u. r3 s0 q0 y+ J4 O4 s
- + r# F4 m0 h8 y2 h
- /**
8 L9 ?# K6 X! ] Y - * @brief Round the given value up to nearest power of two.
5 g5 i3 v1 c" l4 i i! [" i P" r - * @param [in] x: The number to be converted., f; j0 h1 \9 o8 a. ]
- * @return The power of two.
, N: A& N; d2 A+ f - */
G5 E8 f7 c: ]* f- ^ U - static uint32_t roundup_pow_of_two(uint32_t x)) a) K& z5 B6 ]1 ?8 a, Z
- {
1 ?$ q+ k0 Q7 D; F1 c6 \ - uint32_t b = 0;
9 s. t8 J' _7 c0 I/ l! ^ - ) ^! l o( R* }9 \. l
- for(int i = 0; i < 32; i++)
0 P- V+ E% m. e0 V" A - {
1 ^0 q1 {8 p* w - b = 1UL << i;$ x9 c" E( R( i& }" _
% s; T: s3 u9 {& c. [" f- if(x <= b)
+ i+ v2 Q- s+ H# Y, Q: N - {7 ~$ T% t9 m9 g6 Q! |, M3 _* h2 e
- break;$ l7 m' k8 p$ k& j0 e3 y
- }8 J2 ]3 r1 |, O' ?5 c/ s
- }4 U% U$ R" F9 m5 u
- 2 T8 \% {) q# }3 i, z* w8 V
- return b;
* ?: O/ X- P m8 u - }
+ j- b9 N) V4 k
复制代码
' B: ?4 D6 A0 H0 P) g main.c文件
% z; y1 g- F9 |# ~4 N- /**
& v @( j1 L/ x e- j7 g - ******************************************************************************
- B2 I$ G+ m) j8 W7 Z+ h - * @file main.c; I) C7 t* _9 N$ P- U8 B
- * @author XinLi
1 L! r& ?+ A. Q5 r/ U, u Z: u - * @version v1.03 [) ]) g$ X) o* o
- * @date 15-January-2018
' a. _$ }0 U0 s6 O! ~& A) F+ C - * @brief Main program body.# Y* ~# d2 o. G/ o* E5 M5 _
- ******************************************************************************
' b% S4 H+ h! U& B, t - * @attention
7 s+ _; C2 c( U" j2 u - *
! p6 g# e, W4 R" `; L4 k( H - * <h2><center>Copyright © 2018 XinLi</center></h2>- K: t' u: a; I4 n S. p7 | U
- *
8 J3 w5 |% N- p, y5 l$ L, x/ \ - * This program is free software: you can redistribute it and/or modify
+ P4 h% w% K4 t% M* D% o - * it under the terms of the GNU General Public License as published by
+ T9 [. p, G/ q5 Z: U! x - * the Free Software Foundation, either version 3 of the License, or9 B5 b ^8 ^; g8 s& K
- * (at your option) any later version.
/ C0 C! {- @7 @# T - *
+ m/ v5 S, T6 r - * This program is distributed in the hope that it will be useful,
( ?5 Y7 ^3 }3 | - * but WITHOUT ANY WARRANTY; without even the implied warranty of
/ f- q% k- y5 l, K - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- r0 w) W" @, Z& x9 y$ |/ O8 j5 K - * GNU General Public License for more details.
( e) g( _1 r0 M* a7 b - *! X O2 }6 Z5 H" U% x
- * You should have received a copy of the GNU General Public License
, B5 B3 l! q8 I - * along with this program. If not, see <http://www.gnu.org/licenses/>.$ j8 T0 r) R# ], B. H
- *8 ~5 \, D& X3 w1 z9 y
- ******************************************************************************
: x0 ]7 f* Y: n - */( b3 d. V: N, I
+ e* R3 A' l3 `1 w( {- /* Header includes -----------------------------------------------------------*/
) K! R A+ N: ?8 ^ - #include "RingBuffer.h"3 O8 M6 M& |# f
- #include <stdio.h>6 H" l" U7 A: `: v' P- q
- #include <windows.h>
( d5 K: |8 ?. p R2 x
& o" k7 }- b: F- v# p; Q- /* Macro definitions ---------------------------------------------------------*/
$ _" a' l( i3 p9 Y) f! z% x - /* Type definitions ----------------------------------------------------------*/+ k: b% v( z5 {/ j+ d
- /* Variable declarations -----------------------------------------------------*/
0 `4 w$ z( n8 T ^" p( F - /* Variable definitions ------------------------------------------------------*/
h: K; u3 O; X6 x - /* Function declarations -----------------------------------------------------*/6 U5 p0 o5 y L/ `5 P: v
- /* Function definitions ------------------------------------------------------*/
d, t1 \1 z8 H# T0 k6 u) ]
" \$ n* z: T. |7 g" b5 `+ I- /*** s. l1 }1 i2 D; C6 r. e. d
- * @brief Main program.& p) c5 s S9 |' N/ K& d, a
- * @param None.2 J, w# t4 }0 M* g( I3 M a
- * @return None.
& ]& e% C( z" z# t - */
% |5 m7 t1 @. g4 E b - int main(void)1 `* g9 r; T- h8 ]7 w3 x7 [
- {
7 c, W& {5 R# L% o - uint8_t data[256] = {0};
0 m' S$ m: p- G: B0 o; D
6 I, E$ Z- g9 X8 X7 Y& i$ N0 @4 K- for(int i = 0; i < sizeof(data); i++)
; A; v7 I0 s" a. D2 V E1 @ - {1 [4 H$ l- F% c
- data[i] = i; `4 C0 r+ o2 W. E8 h4 k
- }+ l1 Z! s6 l+ D9 D& _5 ~
/ g# A. _0 t: s5 ^! D2 c* T9 G' y" g- RingBuffer *fifo = RingBuffer_Malloc(sizeof(data));
2 e5 [( A/ e F2 y T. X0 O
& h3 Y9 ]/ B: G' ~- if(fifo != NULL)
/ [+ P- s4 E B - {) p6 N/ h& P L/ M; o9 a$ }. c
- printf("FIFO创建成功,FIFO大小:%d,使用大小:%d,剩余大小:%d\n",0 o5 G- P# y6 B$ e
- RingBuffer_Size(fifo), RingBuffer_Len(fifo), RingBuffer_Avail(fifo));# P9 a. F8 B( K8 O: w
- 8 j" q! X: X/ H9 s) P
- if(RingBuffer_IsFull(fifo) == true)
5 {4 z4 X$ B, L5 k- S - {$ U+ g. H. N0 C$ N
- printf("FIFO满了!!!\n");: k! |! ?0 p' i2 b4 |
- }; a% _+ H, y% I% j- |) `
- else
4 o9 @* C/ F' c$ F - {
# L, s Q/ }* ^( e* X - printf("FIFO没满!!!\n");
8 o' g7 `" w/ V! X2 z - }
: l" `4 T" Q7 \
9 D# W# Q' Y. y3 [- if(RingBuffer_IsEmpty(fifo) == true)' h+ d6 a0 E9 n5 H
- {
7 g9 n6 q9 F0 B; O8 p. j, a - printf("FIFO空了!!!\n");
9 |" E D. f L; b+ V: b - }
$ q7 c! }$ m7 c6 J, M' e/ c - else
" s4 @* e7 J# g/ g. E - {
- w# a w8 U: {( j9 U - printf("FIFO没空!!!\n");! u$ K0 U) _6 n. f5 h) O
- }
1 r2 @# x" E& |) ?0 B% f - - B! b8 d9 a# l' ^/ F, h* b
- printf("\n");
. q k! O( P) p; _
5 F* A; M# ~7 o7 r# a- for(;;)
F# ^. l% M9 V6 E1 N - {4 u/ X" ~7 z5 H
- {
/ |) [ i5 @1 i - if(RingBuffer_In(fifo, data, sizeof(data) / 2) > 0) |: T$ W3 \# x, c E8 o
- {+ ^( p& m z0 s) J) S2 K) E
- printf("FIFO写入成功,FIFO大小:%d,使用大小:%d,剩余大小:%d\n",
$ j. {6 W$ i/ | - RingBuffer_Size(fifo), RingBuffer_Len(fifo), RingBuffer_Avail(fifo));
3 {7 l3 p3 f, m9 M+ N* l& o. \ - }
o5 D N( Y7 q! d. f/ u) T - else9 v; X/ ]/ V, B! F
- {
5 Q; x+ X" y& _! k' E) e - printf("FIFO写入失败,FIFO大小:%d,使用大小:%d,剩余大小:%d\n",
( N4 a- l1 c5 |/ k/ @ - RingBuffer_Size(fifo), RingBuffer_Len(fifo), RingBuffer_Avail(fifo));# z. e2 e5 P' [& [$ |) g0 Y
- }5 ]. D9 z0 `3 z* _- R7 h) {! G
- + \" H! l6 o# {7 |8 j2 X3 \4 G
- if(RingBuffer_IsFull(fifo) == true)
8 Q; T( I8 f' u; @ - {
' z" A; }. ?; p9 l/ [) c - printf("FIFO满了!!!\n");
, Z1 `7 T+ f- \, C1 ` - } ~% V7 }: ?: H% j! s
- else( z; O* S0 K# Y
- {" ?8 t% P: d; B/ z
- printf("FIFO没满!!!\n");2 N8 b$ a+ x; ~' H+ v/ \
- }. [) c3 ~- d* V6 T
1 y3 @0 ?6 b3 |/ u3 s5 U- if(RingBuffer_IsEmpty(fifo) == true)) q, N- m! e5 }
- {0 j. @( _- A( P0 S' X
- printf("FIFO空了!!!\n");1 p1 F: n1 R0 Z
- }
/ E* v# Y7 k; r- X+ a, y& P - else
( f' {, o F9 x; B - {
/ l( G! \7 q* {) u, n - printf("FIFO没空!!!\n");2 E! Y& }& h* N8 d! p% A
- }
% G6 d: ~6 @* K$ d - }
* z+ e3 h8 s# K* U" t - 5 N U0 _% T) k C
- printf("\n");( G# x+ W: y4 w6 O
, O y5 i4 N, P& x$ T- {
) [1 I0 E; |: `* u; Z; b - uint8_t rdata[64] = {0};
7 v2 ]/ s9 @6 o3 W* W - uint8_t len = RingBuffer_Out(fifo, rdata, sizeof(rdata));2 S/ \, V( j- n a; G6 z v
- ) O( d( t0 D0 F7 Z3 k; V' G8 D
- if(len > 0), M- Y0 M: |+ R7 f+ i8 `. }% G
- {
7 g- [7 y+ m: S, ~7 e; ~' l, D - printf("从FIFO中读出的数据,长度:%d\n", len);
2 {" a: S& r- p" h. ] f0 ^% Z! ]0 x - . E8 T k( a7 l2 {9 Z Z' e
- for(int i = 0; i < len; i++)$ D# t2 t1 j- z$ x
- {9 q n) h6 F0 x8 u
- printf("%d ", rdata[i]);6 y; @1 i3 J% I A# Q
- }0 n! N. A2 o5 Y, F" s+ v1 ]
. b/ }) \4 _7 Y, V2 ]- printf("\n");1 q, D+ i7 M1 {' m$ Z9 V" @. l
- 3 G0 J! s$ r0 @* L+ u X. K
- printf("FIFO读取成功,FIFO大小:%d,使用大小:%d,剩余大小:%d\n",
; `! d- w9 _5 g! F2 X: M - RingBuffer_Size(fifo), RingBuffer_Len(fifo), RingBuffer_Avail(fifo));! S/ h6 m: u2 f. w3 Q q( D
- }
. K+ r: V, [2 I; B - else
7 `5 H( [! T3 g3 { l/ u$ w( ]# x) t - {
6 D: w; F# f5 u* d+ V) v4 e$ h - printf("FIFO读取失败,FIFO大小:%d,使用大小:%d,剩余大小:%d\n",
2 O! F% _- i( L0 ?" o5 X - RingBuffer_Size(fifo), RingBuffer_Len(fifo), RingBuffer_Avail(fifo));
0 I- r* T/ e( O; u - }' j' V0 }8 ^- h" K
- 1 k& X- l0 q/ Q. h
- if(RingBuffer_IsFull(fifo) == true)
/ \% ~. x7 @ s* L* g5 D- k v - {
; K! ^2 H5 [( e - printf("FIFO满了!!!\n"); U, M) |) r. M# D; J2 u
- } A* q* w* T9 {4 J7 ?" _% V
- else1 ^1 \ Z+ k o6 N, ~: ]7 J2 r
- {( }) c4 K: q f. k- Z5 h
- printf("FIFO没满!!!\n");
: ?- y" p, N' v4 e* } - } v8 h9 v; w# O# @8 w
- 1 n) P6 [! y( v; l& ?& Y" t( C
- if(RingBuffer_IsEmpty(fifo) == true)! Y: \4 n9 V$ d3 w/ S* E, T( L0 V
- {6 E5 ^( l2 E3 P$ z
- printf("FIFO空了!!!\n");
9 I9 j1 J$ L# d2 M0 h9 `7 L - }% `# w* d _" I1 T( j' c
- else! j( ?# A, a! p& w# [
- {0 y& i# w; n- i$ H9 o7 F
- printf("FIFO没空!!!\n");0 O+ p* E* c6 K" {2 N
- }
% T) p) N B, r8 Z& f - }
5 d8 V W* r5 v
D* M6 X* H( u& Y- printf("\n");6 B+ Q- J4 v+ U6 W3 V5 t: Y
; A n) s5 q8 \% }- {
' m# c; @% f- M - RingBuffer_Reset(fifo);
9 d! T, b2 n2 Q7 n0 u - printf("FIFO清空成功,FIFO大小:%d,使用大小:%d,剩余大小:%d\n",5 [4 x5 r" ]0 b7 i% B; c- Y6 r
- RingBuffer_Size(fifo), RingBuffer_Len(fifo), RingBuffer_Avail(fifo));
- Q% r! C& h& F* [4 H& ~1 E - 7 y4 ?2 X/ O! q9 v9 r
- if(RingBuffer_IsFull(fifo) == true)9 Q. S& ~0 P/ F; q: O3 j" R4 B N! t
- {/ ^! d! h, j. q% g& p( ^
- printf("FIFO满了!!!\n");0 E% r# Y3 {9 X: A( i
- }6 S6 o2 t; S0 Q$ v/ y, L; f
- else
3 i; b& O- @ R/ U: E5 o" p - {
* ]1 R7 z9 V4 T0 |$ N/ ^4 ?' k' V - printf("FIFO没满!!!\n");
4 y* e/ a2 w: V* [! a# a0 O" O - }+ e6 W+ f/ W! L& c) E2 B& r
- * p" V6 E B% v7 y- X' n
- if(RingBuffer_IsEmpty(fifo) == true)
2 [$ q! t9 d6 Y1 n - {
- g" q& A0 B- K* D0 L - printf("FIFO空了!!!\n"); x+ d6 }" a( i- z4 g8 K2 P9 h& l; B
- }, C @5 q6 X% |4 w3 a9 p/ u' I
- else2 r3 ]0 q+ q. E0 [, `- C: Y+ x
- {
- l/ v1 ?2 S) Z$ h - printf("FIFO没空!!!\n");
. u4 x, ~1 U% p( k% H/ W- u) o8 @* ?- r: X - }
3 \1 I1 _' C0 ^7 q* d1 g5 {) S - }
* `5 l) _! c3 D* L- w) H/ K - 5 t; ]- R+ V( x/ ^2 J" B
- printf("\n");7 M* z0 J, E$ F0 l/ ~. s! S8 C
- 4 u; o3 X9 E) C! b* h
- {
* p. q, V+ F4 |( y' ]8 ~0 M! ? - if(RingBuffer_In(fifo, data, sizeof(data)) > 0); i) p% p2 b0 |0 e% e2 [: R" ]
- {
% Q+ H* n6 \0 ~4 s" `- b - printf("FIFO写入成功,FIFO大小:%d,使用大小:%d,剩余大小:%d\n",. w' ]4 M5 o4 @
- RingBuffer_Size(fifo), RingBuffer_Len(fifo), RingBuffer_Avail(fifo));
" [7 e7 u1 w0 X% L G - }; }1 ?8 U, m/ [$ H/ ^ ]+ e" k
- else
( A5 c9 D9 u6 ?5 c) ] - {
( J$ b# D! J1 u* t2 V, l$ F - printf("FIFO写入失败,FIFO大小:%d,使用大小:%d,剩余大小:%d\n",7 A' E( W* S9 U7 B' q9 D
- RingBuffer_Size(fifo), RingBuffer_Len(fifo), RingBuffer_Avail(fifo));
* K& ?; G* ?* A+ F, ^ - }: F& l7 @9 d0 T) M$ e& q
8 n" f( {* V1 v5 L. p" z- if(RingBuffer_IsFull(fifo) == true)
1 B. P$ D8 i U - { t! }' K/ y# U' M/ T
- printf("FIFO满了!!!\n");8 v5 f% s$ Q! n4 I+ ~ P( C
- }
# i, d* @# C- f& g- r8 r4 _ - else
! a# k. L1 R. X( ?: X+ e0 E" N - {
3 r9 H9 n, b+ W - printf("FIFO没满!!!\n");2 w9 i- Z. k% N: {8 N
- }
% S* o. b. ~5 p8 ^, `
. \9 O* ?) u4 L6 E! M+ n! x- if(RingBuffer_IsEmpty(fifo) == true)
# Y" ]) w+ _0 p3 l: ~! L1 ]+ T - {8 M! E5 `' Y4 k& \6 C
- printf("FIFO空了!!!\n");" [7 |. ^! ~% f
- }$ Y, r* D1 H- [3 Z
- else _" c* a% u7 c7 t' I% Q
- {
' ?2 E" K% S, h' ]) Q - printf("FIFO没空!!!\n");
! B1 ~6 p t( K0 U; j! g8 w - }
, w- p" b! D" C+ Y8 \% V - }3 p- o: H9 P4 U3 l8 C
- 8 b$ Y* B: q$ P6 ?, l! Y* {
- printf("\n");
2 o; \/ X. Z. g6 _( d- ], h
$ s# f& b+ ~ e* J s- d- {
" L4 ?* W2 H. [. D0 k0 ` - if(RingBuffer_In(fifo, data, sizeof(data)) > 0)2 J" @. C( i, u: v. P0 S
- {' J) w: j5 P1 m
- printf("FIFO写入成功,FIFO大小:%d,使用大小:%d,剩余大小:%d\n",- W: }( W+ G- {+ s4 t0 S
- RingBuffer_Size(fifo), RingBuffer_Len(fifo), RingBuffer_Avail(fifo));
$ j& m9 A, g2 u1 @: C7 Q - }
+ \8 e9 M) J d9 z1 C+ { T) j - else9 c$ }6 r* D$ b# c y3 w
- {
& ]- U+ d# \" S- B Q0 c - printf("FIFO写入失败,FIFO大小:%d,使用大小:%d,剩余大小:%d\n",0 o3 O, x1 c; V( q9 T( n* \" J8 `* C0 j9 N
- RingBuffer_Size(fifo), RingBuffer_Len(fifo), RingBuffer_Avail(fifo));9 n% J7 ?8 h7 ?( j% Z( O
- }! C+ e& B) N" h. e
- 0 a6 ^4 W8 R" U8 _7 ^% m) z
- if(RingBuffer_IsFull(fifo) == true)
" k# ~) S; p1 w, M. S0 o5 v! ` - {
# h) i, P2 S) {" P5 l2 M7 D: ` - printf("FIFO满了!!!\n");
5 k% X# Q. J$ I* _% o* c! o9 D - }
2 a* G9 z0 Q& q: W; v - else$ @5 L, k0 y" j! X$ t
- {9 W8 S6 {1 @: O
- printf("FIFO没满!!!\n");9 h5 H, b& J' b* ]/ y( T% I
- }
* b+ ]) r: s7 w+ o7 p - & J0 e7 @ F1 L0 v+ |0 u/ J5 k
- if(RingBuffer_IsEmpty(fifo) == true)9 I, ]# ]! l) T5 r) e
- {+ N/ x& G0 T j5 I7 D
- printf("FIFO空了!!!\n");
7 H0 [4 j1 b* m( h. s, @ - }
( a# b, K! K8 g5 _9 a6 U - else7 U! m" h5 Y2 |, v- D
- {
' \% l: U& ^/ F& S! T8 b - printf("FIFO没空!!!\n");' }) b! s/ E$ c( \
- }
' i! |/ M& E) Q0 \6 A+ d - }
& E2 v b9 O) Q8 [! e: S! ]
3 f/ x& {9 ~0 _: h3 |- printf("\n");
' q. D2 S! ~' \1 `. f" A
0 S7 e2 K N9 E# V6 t0 j- {2 L! w- I5 b1 O( e% c: l
- uint8_t rdata[256] = {0};
6 c0 J. x# D0 R" Q3 A: t+ m1 O - uint16_t len = RingBuffer_Out(fifo, rdata, sizeof(rdata));
; [9 J5 C" E# d. N - ! [+ z: x! G4 j
- if(len > 0)
/ D4 h' W( F7 o0 b - {
1 D; w) v- F' b. @ - printf("从FIFO中读出的数据,长度:%d\n", len);- a: F0 R" H. J' t* w& g
- . H" l4 k ~* F w1 q" h
- for(int i = 0; i < len; i++)2 L4 \7 a- `3 ?) j) q" j" F) w
- {
9 {! q9 p2 v0 K4 l0 J - printf("%d ", rdata[i]);# D- {7 }. M, b' P% @& i. _
- }
9 ~1 B( |) f8 g - " e" j4 ^- C# ~$ l' f5 l
- printf("\n");1 i! F& Z3 ?: ~9 E' Z
, z& |. K/ W) U" c$ T, {- printf("FIFO读取成功,FIFO大小:%d,使用大小:%d,剩余大小:%d\n",
0 \+ u& K1 T: _$ N9 J7 g; }0 W - RingBuffer_Size(fifo), RingBuffer_Len(fifo), RingBuffer_Avail(fifo)); Y. A$ H, L/ Z9 X
- }6 O+ w+ w% I4 M" E5 ^
- else4 Z" k+ u' B7 U( k* Q4 ]6 s' g1 x: D. L
- {9 D5 r! h# F$ N
- printf("FIFO读取失败,FIFO大小:%d,使用大小:%d,剩余大小:%d\n",
8 T1 R: S. d( L( S9 x) u/ s( p - RingBuffer_Size(fifo), RingBuffer_Len(fifo), RingBuffer_Avail(fifo));
, y% Z7 U0 v0 ? - }
* B! {" i1 Q- i! A2 n1 j% Z$ t - " `5 {' \0 ]5 w
- if(RingBuffer_IsFull(fifo) == true)
& r; j* q$ q, K9 e% e - {
8 Z- O2 d* k4 L( j9 s* N5 L% D; h - printf("FIFO满了!!!\n");: F1 k1 b. B( L* V+ J
- }
( P! G( r* P" i - else, G3 [. S- Q b( V2 w
- {+ @& F; @8 I7 d. T ^
- printf("FIFO没满!!!\n");( b( w! ~) [7 @$ A; \2 m6 P1 O
- }
' e) m' X' p! P5 D4 f; M - $ j2 f: n. t+ Q
- if(RingBuffer_IsEmpty(fifo) == true)
. ?* E2 G3 V' Y3 D+ W& `9 s& J3 H - {
2 r( h" @# _6 i; d* d - printf("FIFO空了!!!\n");
+ b0 @2 j# ~/ j. X - }
, h" E& [9 }* _9 _ - else
: n. P& H r3 f - {
4 |4 D3 o+ C7 X5 T - printf("FIFO没空!!!\n");
# E9 H7 a6 F0 i# t( X8 B - }3 ]* C* \6 T# q0 F
- }
' N" A0 |5 L1 y% ^) ~9 R( A
, }# c6 b: B! u$ B- printf("\n");
0 l# `8 b5 g" B/ a$ |' G( W
0 ? M4 ]) f% }- {9 R0 i, C6 G) M4 g
- uint8_t rdata[256] = {0};. k" A4 z. J8 ~! X, V1 D
- uint16_t len = RingBuffer_Out(fifo, rdata, sizeof(rdata));8 J$ Z, {7 L2 Q! z4 I6 f6 }+ {0 P
8 u& w3 F- ?& A. E, q& N- if(len > 0)
' J. y7 ?6 S& L) f+ t) L - {
; U5 T/ v, t* E0 G5 z: Q/ b - printf("从FIFO中读出的数据,长度:%d\n", len);
! h. O h. F, [6 |3 E - # |: g. X$ F9 J, h$ [' ^5 H
- for(int i = 0; i < len; i++)
5 L# U4 ?% |6 G/ {1 i# [+ v - {+ ?2 o1 u6 J" D2 a: s
- printf("%d ", rdata[i]);
! t: N5 j2 y% [ g- b - }
7 I' h$ W; J4 g* q* @2 Q% ^6 h - # Y; c, b) Z3 f) t
- printf("\n");
) {' q" Y# |2 F8 g" k9 d1 Z5 v - * Q4 }: x' G6 f( f. X6 z
- printf("FIFO读取成功,FIFO大小:%d,使用大小:%d,剩余大小:%d\n",
5 _+ m& k; p& B5 t n - RingBuffer_Size(fifo), RingBuffer_Len(fifo), RingBuffer_Avail(fifo));5 g6 m! y; o4 i4 X; E1 I+ _
- }4 i2 H9 i9 k4 q- Z9 J
- else( o+ |. D6 {# e* P( m0 Q% {, {2 ^
- {
9 h$ _1 Z, T1 s/ e, ^: { - printf("FIFO读取失败,FIFO大小:%d,使用大小:%d,剩余大小:%d\n",
3 f1 z+ a: E7 i - RingBuffer_Size(fifo), RingBuffer_Len(fifo), RingBuffer_Avail(fifo));
1 i; }; L/ V) q, R, m! c - }: A7 e$ K O) R2 [* t9 @
- $ p" J4 B2 ]# x3 R- V" U
- if(RingBuffer_IsFull(fifo) == true)
: t$ x$ }6 \7 A M* K- b; h% E* A/ d - {
$ B3 J0 C/ k1 F4 K - printf("FIFO满了!!!\n");. F9 V3 B% t9 V: x. Z& s. I
- }
: e' w- E5 |/ @& X - else
- N# F; c6 ^3 G9 \" ?& ?. g( N& y - {& d0 K' X2 {% m! E% Q: j
- printf("FIFO没满!!!\n");* i9 Z9 z& \* I9 l
- }
% V! F3 o1 S& S/ e" q& Z - 5 e1 O; Z; j1 s' G
- if(RingBuffer_IsEmpty(fifo) == true)
1 e: N' E3 F! u; G# g - {! D- ]7 T: O4 @1 }0 a) ~( T( I
- printf("FIFO空了!!!\n");
- v& C6 U2 Y1 h4 b& M8 X - }4 D) T. f: u+ u% a. y
- else
1 a. s) b5 W5 P - {
) A' C# t2 \8 ^- I; X9 X' X5 W: s - printf("FIFO没空!!!\n");$ X0 k K" I. L& t3 I
- }
; }: ?; T6 x* Y6 C- J; E6 T - }
X2 D" _1 H/ \/ Z( n' x - " U1 w3 E& I4 x f9 X2 q1 C; D% Q
- printf("\n\n\n");
. y5 C/ x( j0 {$ P @3 x; O - Sleep(5000);/ _6 F1 d! A" E# G
- }+ Q0 c& b: S9 g6 Z A
- }
* C9 m' z- i* A - else4 H3 J" |2 ]6 d$ x0 ]- T
- {& {; o: B0 m, y& T% P' K! c
- printf("FIFO创建失败\n");( _+ X; W* W0 w1 N0 \# F; F
- }- {- b; r: r! m$ }7 P# `
- u; y! u8 X& [/ U
- for(;;)
- t6 t: T& d8 ~ - {- `, x& y) @, \7 q0 t8 K. V* k2 P
- . B4 A7 ^* B: Y% i
- }
0 L0 u3 I3 p1 p4 I+ N& h - }1 N+ i( x a' A3 Q q& S% _- S( u
复制代码 ' m3 q6 V' b K8 A d- C! u
3,运行效果
" Q% T. B" m; l3 N& m$ O% i' V2 L! b5 O2 `8 i0 }) E. C" W6 b! o# }
5 C) j( Q; l. t+ F9 X; k2 R |
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。
2 |; D' X( s: _2 o
谢谢分享 - {' W# y) V' |+ P3 C+ s" C
以前搞过ram模拟fifo,还没用过环形fifo,学习学习。
* M* n; F# p' s& H# e* `
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