模仿kfifo实现的环形缓冲区
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1 a( N) X6 b- |5 y7 F转载来源:模仿kfifo实现的环形缓冲区3 w3 @* ~* @8 u6 x5 q, Y5 V
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GitHub仓库:http://github.com/XinLiGitHub/RingBuffer
$ \+ C0 H$ b) o1 a" b0 aPS:博文不再更新,后续更新会在GitHub仓库进行。
# E7 U3 X( W- u" @2 S0 V X+ E% k
9 V/ F: Q8 B7 b+ D4 r h( { 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)。
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1,开发环境
) s' J S% Y: N2 Z1 W1 i& D ^9 j 1,操作系统:Windows 10 专业版' _3 F9 x4 l0 C/ ?# ]8 h
2,IDE:Visual Studio 2015 专业版1 }3 G0 B7 l8 a; i
, r N- s& r. ~% ?0 D" g2,程序源码- }3 Q! e$ y9 Q5 x
RingBuffer.h文件2 K7 n3 x7 `8 h# \4 P w4 T. G
- /**4 ?& k# K9 \/ P& H
- ******************************************************************************
. b) k7 `! E! w$ w. y - * @file RingBuffer.h
3 a* f2 V( H' K - * @author XinLi2 o& O( g3 W( p" P! q
- * @version v1.0+ D, [& t# s, I$ b4 q& m
- * @date 15-January-20186 u0 ~- K0 M8 U L5 M
- * @brief Header file for RingBuffer.c module.0 |% D+ s8 a0 d# _
- ******************************************************************************2 @- E; W4 P8 K" u: `/ } B
- * @attention) v& o4 x) u# O1 m1 |: I
- *
" U6 D2 G! _6 S% I - * <h2><center>Copyright © 2018 XinLi</center></h2>
: |# \+ \- ]& K - *
. K- j7 s- |6 s! A! Z0 \# m1 @ - * This program is free software: you can redistribute it and/or modify! s7 Q4 P+ Y* `( E) `& j
- * it under the terms of the GNU General Public License as published by- P( l g p/ Y: `
- * the Free Software Foundation, either version 3 of the License, or
4 B2 ~# L7 }0 H5 m& r - * (at your option) any later version.
( c6 d9 s1 V5 C! ]3 W; V - *
! K$ u! V/ e4 d% h, c1 Q - * This program is distributed in the hope that it will be useful,/ Y3 C) A" R: @5 h7 L: a; ^
- * but WITHOUT ANY WARRANTY; without even the implied warranty of$ I# G/ C* M7 |9 e
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the9 ?2 Y2 \ W0 O6 Z" C6 u4 \- u
- * GNU General Public License for more details.' Y2 p1 b3 i5 h2 d' C/ \6 [* e/ L
- *
/ M! R+ O$ l* V - * You should have received a copy of the GNU General Public License5 f3 P( [: x6 S; d+ T
- * along with this program. If not, see <http://www.gnu.org/licenses/>. B8 m9 T& h* f1 p' [) ]$ o
- *
) r0 t+ O" _0 Y - ******************************************************************************
4 _) _1 d2 R7 Y) A4 E3 _: ~ - */
! u8 y I6 q3 o) B3 G
6 r6 @, l- R) L2 r- #ifndef __RINGBUFFER_H
; e6 X/ {: I2 { A - #define __RINGBUFFER_H% Q% L$ @. B( U
- 0 V8 ~" i( E/ I' m) i% p5 T: k
- #ifdef __cplusplus
) D. G V% Y/ {. m7 U7 S5 c h, Y - extern "C" {
6 D8 r2 y; M# `: p/ t$ s/ p6 J3 Y( _ - #endif1 s% ~' J& a! y& k
+ G$ M4 }" }$ B; D( b6 S- /* Header includes -----------------------------------------------------------*/
) I4 _) m$ L9 X - #include <stdint.h>9 O/ a$ i0 i" ?& k
- #include <stdbool.h>
4 { f& I' k, \' c) Q0 d
* ?4 q, T$ M& u- R- /* Macro definitions ---------------------------------------------------------*/" M; E2 o/ S. O0 x
- #define RING_BUFFER_MALLOC(size) malloc(size)
; H) ?8 y& y: l4 w - #define RING_BUFFER_FREE(block) free(block)
" e$ \/ U! H( M5 V7 ?3 X5 x
6 h0 u" l: {! E- /* Type definitions ----------------------------------------------------------*/
- u; l0 S) V2 @& p3 w8 @4 ]& @3 I+ X - typedef struct$ N, U6 X- S) }) J( x
- {
% J, h9 \# w$ P& ` - uint8_t *buffer;
/ T; H+ P7 v z& m/ b6 ` - uint32_t size;, ^# |% L }4 a& T4 O7 k( t$ Y
- uint32_t in;
0 H( U4 R: H4 w/ t7 W1 Z: X - uint32_t out;
6 I ^* f6 p( I- O* x - }RingBuffer;
" j5 u3 q% }8 ]( Y& u3 Q5 P! D
# L9 F( I% X3 z# d# v& s- /* Variable declarations -----------------------------------------------------*/2 H7 f1 [4 S+ a) t6 Q* |
- /* Variable definitions ------------------------------------------------------*/0 L. r8 Z3 b) {) |/ K7 H- |
- /* Function declarations -----------------------------------------------------*/
( P- {: [" x" C& A, e+ K - RingBuffer *RingBuffer_Malloc(uint32_t size);
$ D1 `9 K( ]+ Z/ d: }* j - void RingBuffer_Free(RingBuffer *fifo);
' G$ N3 \8 q% i) L4 o - uint32_t RingBuffer_In(RingBuffer *fifo, void *in, uint32_t len);
/ S' ^ \( }. E* m# U7 s - uint32_t RingBuffer_Out(RingBuffer *fifo, void *out, uint32_t len);' w9 ~1 ?, Z! R7 x5 q$ g6 K
1 n* D3 P& M" |4 r4 }' m2 k- /* Function definitions ------------------------------------------------------*/
3 l3 H/ V; p, T% C* w - 4 H1 p! i' c) H3 L
- /**) w/ J7 X2 L, M# Z
- * @brief Removes the entire FIFO contents.: a1 ~# b) I9 `, A; Q2 j
- * @param [in] fifo: The fifo to be emptied.& u7 E+ n9 d U: N1 A2 g' A6 Q, L
- * @return None.
+ c4 }, i. P" ?1 J% m4 [ g8 v - */
) j5 [# I M6 ]6 L" }* w - static inline void RingBuffer_Reset(RingBuffer *fifo)
2 P9 m3 E/ ?# ^& u# ] - {# V+ M7 z1 y V
- fifo->in = fifo->out = 0;3 l2 e, z5 u4 W
- }
* ?+ m, R: Q2 s8 P @$ s- a
7 D* F: e4 \2 a- Q( u- /**
: b3 f3 ~6 q7 [: z6 H' S- H - * @brief Returns the size of the FIFO in bytes.$ L, z2 D3 b2 e* [5 ?* O l9 d
- * @param [in] fifo: The fifo to be used.7 F& ~0 Q, t2 U5 `
- * @return The size of the FIFO.
9 g7 d! x% `- \. e - */
8 P+ R) M8 ^: M6 \ - static inline uint32_t RingBuffer_Size(RingBuffer *fifo)
. u+ |1 q+ F5 r2 Q' x - {
( X+ r0 Q. b7 r# a/ Q/ L - return fifo->size;
3 e- Y$ a, o" D3 V' Z - }- j) ?. N$ A6 |
' w! v( H O$ S q7 G" n8 Q- /**
( a. l" i G/ ?+ E, Z - * @brief Returns the number of used bytes in the FIFO.7 W: i- ?( s; k. Z) G! u |
- * @param [in] fifo: The fifo to be used.
% x. y7 N/ J2 \" _ - * @return The number of used bytes.( H) v1 q% G3 Y, R0 e$ d7 u9 A
- */1 ~1 H- g- m$ l/ c
- static inline uint32_t RingBuffer_Len(RingBuffer *fifo): w. V8 X' X& h% _& A8 s! ~4 C
- { k/ a; a) j" k$ G
- return fifo->in - fifo->out;
# H M( J# t7 l, m# K3 Z* p - }
6 u/ |1 X. j5 E! V; n" r( S1 i1 c - % A" t; O0 w& U! x3 o* R
- /** |5 E/ n( D' U [" k& u- L) D2 W
- * @brief Returns the number of bytes available in the FIFO.
4 j& M# L5 y# g- Q: S, D9 H - * @param [in] fifo: The fifo to be used.
- `! q) k6 [* ^, ^ - * @return The number of bytes available.- P. |9 @1 U' Q0 @0 z: H
- */4 o' S! b0 |1 |5 D) t0 w$ M
- static inline uint32_t RingBuffer_Avail(RingBuffer *fifo)$ ? {0 z* `! X# e, W
- {. H+ \! d E/ E: n2 }+ c8 k
- return RingBuffer_Size(fifo) - RingBuffer_Len(fifo);5 K" [, s, K' S8 M
- }; ^# q a V2 K' i
- " \$ r8 W2 E1 r0 z0 `8 @. Y; U
- /**
: {. r7 u, _. D5 q/ d& z9 ~) n5 r - * @brief Is the FIFO empty?3 Z( x) i1 O" j
- * @param [in] fifo: The fifo to be used.4 D: _0 V% P/ J/ q; U
- * @retval true: Yes.5 R3 |3 I- @' R. D* s* H7 ]; d% {
- * @retval false: No./ m4 a3 c$ z4 c. s- K* H+ M) v
- */% {3 l2 c2 d6 n9 O- h& t! y
- static inline bool RingBuffer_IsEmpty(RingBuffer *fifo)% `6 L: P( P3 T& q9 v0 E& ~
- {+ ?0 o1 ~4 ]9 ]3 |* ~
- return RingBuffer_Len(fifo) == 0;
4 Q* x5 \( B* L - }
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! |0 @$ j1 {. A/ b- /**
4 O4 b; D$ S4 \ - * @brief Is the FIFO full?+ d4 i }. I1 k* c: m
- * @param [in] fifo: The fifo to be used.1 Y4 y' M' m7 h! Y% {2 \
- * @retval true: Yes.% S- m) c9 v. O6 { G/ X
- * @retval false: No.
) w. C" m: z/ l0 a' p: H! R9 Y! w8 R - */
" w! }5 u( ?2 p - static inline bool RingBuffer_IsFull(RingBuffer *fifo)
7 o' }* K7 y& @& m3 D* X) H - {
/ ^% ~- |6 K8 |6 N - return RingBuffer_Avail(fifo) == 0;6 b0 Y# C# [! z* D- V) E
- } i* F& B! c0 f: `1 T
! z# {4 |& j8 t( Z S* t- #ifdef __cplusplus
- _ V3 V l/ @2 y/ g - }; R j+ j4 S2 C9 t- U3 y: O
- #endif
2 r4 W( w8 Y' I+ t0 S: p3 \
6 K/ W/ A: \+ s, ~5 H: O/ J" t7 q$ l7 C- #endif /* __RINGBUFFER_H */
% R1 W6 L, ~& s3 }% U: E; i
复制代码
5 E1 l5 E7 I1 {7 I RingBuffer.c文件+ i; S+ O. _ F. T8 q
- /**
/ Q9 H4 | I$ S1 g( H' W2 y; R2 p - ******************************************************************************
0 _0 t& t. w- r" k7 L - * @file RingBuffer.c
; C; V/ t# O8 J# V. E - * @author XinLi
# K7 H& e5 u0 K - * @version v1.0
% X1 o3 X) E) }! M, r$ V: C; {8 a - * @date 15-January-2018
' ]; i3 h0 w) E# |/ y - * @brief Ring buffer module source file.; O. N9 }* p& c( V+ o% H
- ******************************************************************************
3 |; L8 b- `2 B1 ^, k* Q7 q - * @attention) p$ c! E$ Q* F# Q' f- a: I! s
- *6 C4 G. t; \' n5 q
- * <h2><center>Copyright © 2018 XinLi</center></h2>, T. Y3 A* w6 k
- *7 X# P- i- D4 N: Y
- * This program is free software: you can redistribute it and/or modify
# Y( p7 M# ~; d& Y! {4 I: j) c' B - * it under the terms of the GNU General Public License as published by' p0 b( J. u! `# u; C
- * the Free Software Foundation, either version 3 of the License, or
: J0 V X: X+ Q- N- [) B A7 t( L - * (at your option) any later version.: W( ]$ [. j1 L; y
- *
5 }4 \) S4 {8 I, ]- ~! K - * This program is distributed in the hope that it will be useful,
8 h1 ]& M0 ?% P! P/ a+ d! s3 u" z - * but WITHOUT ANY WARRANTY; without even the implied warranty of+ `6 Y8 J9 z8 O6 r2 F/ s) z: U# N
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the, v) n3 e8 l- K1 \0 v
- * GNU General Public License for more details.3 X3 B# f! x) {# k& Q
- *
5 D6 Q) `$ c9 S* ^ - * You should have received a copy of the GNU General Public License. v8 K- k# l5 P4 d8 C% r
- * along with this program. If not, see <http://www.gnu.org/licenses/>.% E& `- [2 L; T- f% l; c. F; P
- *" S7 C0 O* k- R F4 z
- ******************************************************************************( G' ]# M; l5 V# k# Q
- */
. X/ |& B2 d" v# P& s1 O5 z( E - ) a. ^9 m/ | A7 [+ f# _
- /* Header includes -----------------------------------------------------------*/
8 N b: V) C2 M# ]% V$ C& m - #include "RingBuffer.h"7 @& K |$ |3 B v( S3 s% T
- #include <stdlib.h>1 V/ ^, r: o, r- p
- #include <string.h>
$ Y( I: ]+ R7 v& X - 1 r3 k/ n2 v+ @- q* H. q
- /* Macro definitions ---------------------------------------------------------*/
" k7 B8 Y9 s7 ]/ m7 i0 g' B; q: m - /* Type definitions ----------------------------------------------------------*/
, i+ G, s9 n( o- k. H! O - /* Variable declarations -----------------------------------------------------*/
- ]3 R' h+ w b6 X+ ? - /* Variable definitions ------------------------------------------------------*/
8 ]9 }2 e0 F' S }4 Y1 C - /* Function declarations -----------------------------------------------------*/
m. K+ s7 O* r$ V% p. H - static bool is_power_of_2(uint32_t x);2 {8 E% I$ M- h$ v M4 j N( O
- static uint32_t roundup_pow_of_two(uint32_t x);& g: L4 I ?; p/ o+ l, R+ S5 b
n d1 C( M( S0 c* o- /* Function definitions ------------------------------------------------------*/; `6 q4 m8 g; G
- 8 \" g$ n: F% X" F( q/ t- G
- /**
2 j- D8 Y! |; S- [ - * @brief Allocates a new FIFO and its internal buffer.
% c, ^6 \' L3 k3 @2 r1 ]( B5 M - * @param [in] size: The size of the internal buffer to be allocated.3 x' L5 i8 }# B; {& l6 K7 @9 g( ?
- * @note The size will be rounded-up to a power of 2.
9 O3 B" Z7 J* a5 C2 f# \ - * @return RingBuffer pointer.2 B5 h2 q" U/ k
- */
: H& z: C% Q1 Z! _* ? - RingBuffer *RingBuffer_Malloc(uint32_t size)
& q2 y a( L) }+ [ - {
4 N: q, v/ e3 X" P - RingBuffer *fifo = RING_BUFFER_MALLOC(sizeof(RingBuffer));. R8 c- t1 Z! l( n4 }
- ; R! I K" {6 o7 O6 q% {1 |$ y; F z
- if(fifo != NULL)) l) t4 u, O. C
- {
5 R0 L# C# L9 V5 P, W% u - if(is_power_of_2(size) != true)1 T+ j) |0 h+ C4 M
- {2 J% S* i' \$ F! A% [% f
- if(size > 0x80000000UL), {! l6 ~2 [( I/ f% m2 Y
- {
% t" a) _& Y0 ?9 b - RING_BUFFER_FREE(fifo);# Z% w, q! ~; }6 I* K# Y
- fifo = NULL;
( X; ~$ G; b6 {8 v - return fifo;
V/ a" T5 Y: q# g# d5 @" [ - }
" H$ r2 r5 @" q5 ~ - l: \# q% m+ ^- x) j. A
- size = roundup_pow_of_two(size);( t5 g6 n- }0 J2 i: K
- }
% }( e! n4 v* j# X8 |9 U, Y
, u" B p2 ?1 Q$ A% t9 B- fifo->size = size;. O- t9 Z. i, b g
- fifo->in = 0;" { V7 Q0 w* O- f7 b6 l9 V+ t
- fifo->out = 0;5 ^- R0 J: r$ } r
- fifo->buffer = RING_BUFFER_MALLOC(fifo->size);
& e( x3 g2 j; q% X2 e
3 O* V3 g# E3 H- if(fifo->buffer == NULL)
4 P3 U9 Z" q; ]: ` - {1 I7 f7 z! p5 m/ ]2 [% [
- RING_BUFFER_FREE(fifo);* S! @1 e% r& ^
- fifo = NULL;
" J. }' N; b K" j% m4 w - return fifo;, y5 e3 Z5 C# ?, `- y# Y
- }
! U% W7 r" S4 t ^+ u( ~; M - }, t6 r; k3 H" R( y
- S( R8 z3 o5 f3 `% D- return fifo;& n& M# \5 M/ ~8 S
- }
) h1 e9 E1 C" ^- F
9 ~5 k9 `% C0 V. Q4 N+ M- /**
5 _' s# U3 a/ c3 a8 Y( `( `0 N - * @brief Frees the FIFO.. T- U; X0 K; s6 g( j5 U
- * @param [in] fifo: The fifo to be freed.4 d0 V" d1 j& E- |, P6 h
- * @return None.- u+ K. F- w t4 Y
- */2 Y9 |7 S& ~8 h' B% r1 Z- u
- void RingBuffer_Free(RingBuffer *fifo)
+ R$ q6 C5 E; f' E$ \ - {0 K! w8 B) m0 _
- RING_BUFFER_FREE(fifo->buffer);$ I. w0 S' |/ c. U2 [7 H9 X
- RING_BUFFER_FREE(fifo);4 I! q$ W: M9 f9 h" `
- fifo = NULL;
3 s$ f- Q c- o* F - }
& \6 g# O6 M; R9 L" O
: @% x( ^! e( F Y- /**. ~% p' W5 R9 s8 C& \
- * @brief Puts some data into the FIFO.' k" o1 G w9 M J# {- y
- * @param [in] fifo: The fifo to be used.5 R9 W N: u- o4 X4 s: b/ F) ^
- * @param [in] in: The data to be added.; o5 p- P' \4 H7 P
- * @param [in] len: The length of the data to be added.* d$ ^3 Y* \6 c% p
- * @return The number of bytes copied." Z. ?+ s0 U7 j1 d1 t
- * @note This function copies at most @len bytes from the @in into
% v* b0 c! B7 o& s9 ~ - * the FIFO depending on the free space, and returns the number# B" F% \. o# ?$ ^% J) h5 n6 O
- * of bytes copied.
7 [- b* e% m- k: o - */
1 F! s4 Y- l+ a% O p- U - uint32_t RingBuffer_In(RingBuffer *fifo, void *in, uint32_t len)
7 q: w( {9 |# W% s. c! R - {
" {* l6 ]' E1 H0 |2 ?1 R! A - len = min(len, RingBuffer_Avail(fifo));( r; W$ o1 m# Y+ P3 M0 m
# C. D6 I. W0 `% A) G- k0 C7 f- /* First put the data starting from fifo->in to buffer end. */
2 o; d' ]- ~! {$ [, [ - uint32_t l = min(len, fifo->size - (fifo->in & (fifo->size - 1)));% e- [/ V0 E; c q, o& s& g
- memcpy(fifo->buffer + (fifo->in & (fifo->size - 1)), in, l);
`% M2 W, g2 P, Q4 J- e
0 V& J/ \9 p/ u: M- /* Then put the rest (if any) at the beginning of the buffer. */
5 _; T5 {: R3 y) l$ p - memcpy(fifo->buffer, (uint8_t *)in + l, len - l);" L# |$ p& K2 K% {
; _# ]1 Y4 W- K- fifo->in += len;& V' G- a. G% J) ~, A
- 8 g' ?8 S, i- s" n
- return len;
, `) E4 F+ |, ~3 F( y; r _ - }& ]8 @( G+ l1 L3 J! O
- 3 V5 g4 n! D7 x; E& R* D
- /**
9 q5 d+ I! e4 F% n0 H* T/ M* V - * @brief Gets some data from the FIFO.
& W2 X J. r; \ t6 h - * @param [in] fifo: The fifo to be used.
" N3 N$ x/ ]* |. Y, K4 Q - * @param [in] out: Where the data must be copied.1 E* ~5 h: k8 E' R9 k+ K/ F7 o
- * @param [in] len: The size of the destination buffer.
a( J9 b4 I. ?$ h% T4 Z8 n9 R - * @return The number of copied bytes.
2 K. W7 t/ _* K# o. o9 x - * @note This function copies at most @len bytes from the FIFO into" }5 D: K4 R+ [/ u) X& [* i# H- O( q
- * the @out and returns the number of copied bytes.
/ R: H5 r% K& k - */
0 A7 M7 `1 N' P8 W! M6 Y - uint32_t RingBuffer_Out(RingBuffer *fifo, void *out, uint32_t len)
/ S; t; l' V, O9 L8 ~8 Q3 G - {
* q9 N) P! W" S3 M5 X - len = min(len, RingBuffer_Len(fifo));" ^* ^3 n( Y' b. e0 d
) H( o# h" L S% y2 W: [, ^- /* First get the data from fifo->out until the end of the buffer. */
& v* l j. N- i - uint32_t l = min(len, fifo->size - (fifo->out & (fifo->size - 1)));" G4 r& t1 s& B+ M6 U
- memcpy(out, fifo->buffer + (fifo->out & (fifo->size - 1)), l);% Y5 @+ O! O2 \+ A3 g* j
4 K5 L$ \1 E6 j6 ^6 p- /* Then get the rest (if any) from the beginning of the buffer. */& m( ?3 @: J9 w. W* i
- memcpy((uint8_t *)out + l, fifo->buffer, len - l);) ]; v8 v9 m. T# } [( d
* a) H; b0 z! r1 v$ R" W# w* P- fifo->out += len;0 x5 q m z% h0 m7 z2 H
- ; h& w# j9 |4 l$ q8 g
- return len;
3 q7 m6 G; `$ _ - }
# V( u+ J2 ]" G; Z - 1 P- |! `5 T7 J* d( a
- /**
2 L8 x6 P. |8 {4 _0 H# y - * @brief Determine whether some value is a power of two.
+ T7 N! O5 h, { - * @param [in] x: The number to be confirmed.
; [ w: Q/ c) u7 k, z4 S - * @retval true: Yes." p0 X/ N: [1 p# _$ ^8 z
- * @retval false: No./ g k7 V2 x$ B: h& Q8 F
- * @note Where zero is not considered a power of two.
0 d6 L# J# |# H& a0 c {6 O( m: N - */
1 L/ H' E: }; L& c - static bool is_power_of_2(uint32_t x)) [$ p6 u8 k# k
- {1 n" e8 D `. e6 t2 o9 E$ d% Y
- return (x != 0) && ((x & (x - 1)) == 0);* s8 H# B9 o2 ^
- }8 L6 k1 b8 q4 i5 n: Y4 x
- # W; i1 I' y; h3 k0 P+ ^
- /**
- M' \, R' X$ J6 z - * @brief Round the given value up to nearest power of two.
7 p5 u3 t( {. u4 N0 A3 N - * @param [in] x: The number to be converted.3 g; q, b R. ]2 {) s. @
- * @return The power of two.1 w% @0 @( g- s/ u
- */: L& E( d8 ]8 i" ~) ~
- static uint32_t roundup_pow_of_two(uint32_t x)& }" Y' P7 p8 _% t
- {
1 ?( a, O n! h - uint32_t b = 0;& |( ?$ f$ \' u2 C6 x+ C3 e
- / K3 F% j1 w- y6 V2 ~
- for(int i = 0; i < 32; i++)
' @9 y: |, n( Q! Z& S6 Y - {' O6 z( }+ K4 @% t, T
- b = 1UL << i;' q ?5 f; O: G
- 6 B' K: l" m3 ~) k4 c: t5 f
- if(x <= b)
$ n8 v2 U4 R! J' K/ J - {- b7 f6 J* K/ q- q
- break;
6 J- D( ]: u% Z' O3 \ - }2 X! F9 Q1 {* p; p2 V; y
- }
9 ?- B, c# ]( g% {# m- y) \
4 s4 c4 z4 E3 v: e- return b;
# x# x. X/ ]/ J7 t$ p/ D4 u, ~ - }
# L b2 z( z$ s. ~- M0 ^3 }4 ]& A
复制代码
( Z+ W s- o: {0 k# E2 D main.c文件
( h! J; o# A5 a7 A- /**% ~8 P$ T. r: {6 v
- ******************************************************************************
: Q. q9 G) C$ J% J% {& R* N - * @file main.c u ^5 I7 Y: w
- * @author XinLi; _* b$ h# z+ P# \5 K" U1 |6 P+ m) x
- * @version v1.0- U2 F! a) W4 y# B- E
- * @date 15-January-2018
3 h1 E9 C2 S( R! S; U e. q - * @brief Main program body.
! _: Q" G% {) i& u, P$ ~: @/ ` - ******************************************************************************, s9 E& O, A1 r4 W5 _
- * @attention
/ J+ F% y; W9 W) @7 L6 u' c - *3 j% B- v- r: ~+ A! Z& A5 m
- * <h2><center>Copyright © 2018 XinLi</center></h2>
' i/ p6 [$ g# E p, Z - *7 z, i2 u0 T: W& ]! ]: R
- * This program is free software: you can redistribute it and/or modify
0 m. r& a- v* a* x; b5 o/ p - * it under the terms of the GNU General Public License as published by
* h& X: m, w5 }* c, C - * the Free Software Foundation, either version 3 of the License, or4 U' T& E* e- L3 }; `5 u
- * (at your option) any later version.2 \- t6 I3 t" G- @8 V( J4 D: X5 {
- *
) G, a- p% m! `6 z C8 r0 ?/ ^9 `( o - * This program is distributed in the hope that it will be useful,0 }* S, b b3 X( a- R e" C
- * but WITHOUT ANY WARRANTY; without even the implied warranty of+ k( O0 m7 Z* _% O
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the, c' L9 I+ J) x0 ^! c/ P1 q5 d
- * GNU General Public License for more details.$ }$ b x0 Z$ g3 M# z; w
- *( X7 t, }) C& x
- * You should have received a copy of the GNU General Public License8 r) Q6 c; n3 G' z) ?
- * along with this program. If not, see <http://www.gnu.org/licenses/>.+ ~' u6 p: |. ?/ f# `
- *) n. l: u6 V9 \
- ******************************************************************************$ h9 Q8 F, N/ q# `+ S
- */ F% J# v: B! V+ ~4 f: @. J4 S
+ T7 {: \9 A# k5 |- /* Header includes -----------------------------------------------------------*/
5 x% w; h4 ]( f4 |6 c - #include "RingBuffer.h"5 ^# w! `2 T8 D8 v h; ?
- #include <stdio.h>2 r( h, P K8 Y2 Q2 R/ D" G- c+ a' P% P
- #include <windows.h>
+ C6 F5 f. `0 T - / l% L1 m( J* k( n6 t
- /* Macro definitions ---------------------------------------------------------*/3 G9 {/ X, I/ M( O% {8 C
- /* Type definitions ----------------------------------------------------------*/3 {4 s1 Y8 P2 e+ L2 F# ~
- /* Variable declarations -----------------------------------------------------*/, f- ]. T% V; _9 r
- /* Variable definitions ------------------------------------------------------*/
% x5 J/ Z: I0 I# K" d/ X - /* Function declarations -----------------------------------------------------*/8 I4 E( x+ l1 _5 Y* b% f( ?! b
- /* Function definitions ------------------------------------------------------*/5 v5 l9 a- w3 C% H
- ! H( @9 u! O4 o) y* ^8 D6 J
- /**
: ~9 O$ A/ L- a3 C - * @brief Main program.7 w; b/ p: r. L- {; U- U3 M7 \( t4 Y
- * @param None.
4 D$ w! j$ a, k! e2 }, z% c1 l - * @return None. c3 S/ h$ s0 X6 H$ j+ l+ A
- */& {. j% g4 w! R9 n- K) }
- int main(void)
4 Z/ G$ b5 e) `- ? - {
- p! ~: F# T4 F - uint8_t data[256] = {0};0 d# B" K: ^, C+ ?5 R; K' B
: G2 N9 x5 b5 W- for(int i = 0; i < sizeof(data); i++)
! e. R) o2 Y* t7 T( O3 p3 K! H/ f& ? - {
n; E( b( T: m: L4 K - data[i] = i;0 ]2 [) \+ T' d/ V$ [3 z5 e
- } e, M3 G& Z, j
% P# D6 q6 U/ Z5 C% T/ G) N9 N- RingBuffer *fifo = RingBuffer_Malloc(sizeof(data));
1 I- C/ G- B1 R8 \- F. u) _/ }- v2 Z - ( I& N$ p$ [6 Y, _0 ^0 R' E
- if(fifo != NULL)+ Q+ C; R' w0 @; K* {( r( i. |4 Z
- {% e0 Y; a0 {; k) g a* n$ s, ]
- printf("FIFO创建成功,FIFO大小:%d,使用大小:%d,剩余大小:%d\n",
% ]0 T5 H! ?% e8 x$ g( E - RingBuffer_Size(fifo), RingBuffer_Len(fifo), RingBuffer_Avail(fifo));
6 S [' [% W) ~% Q; z$ s. J - 3 w3 S z; A* Q' s' S' V
- if(RingBuffer_IsFull(fifo) == true)
* P) d7 f3 A+ a - {7 {( x; ]5 z5 r* ]
- printf("FIFO满了!!!\n");: c' j9 R! a" v4 n- q. K
- }! }" Z" \3 y s. G# U
- else9 @3 b f$ s1 L' G- Y1 E
- {
7 V- D' P# X, H* A7 w - printf("FIFO没满!!!\n");" U9 _" T" }4 C, b" {3 s" ]7 ~
- }
9 x D+ M9 E) k: f; D8 R
) m" A0 ?5 d! [4 K, _9 d- if(RingBuffer_IsEmpty(fifo) == true)9 Q, t- U. e7 A e
- {
0 `6 W o7 X2 u! X1 R1 n - printf("FIFO空了!!!\n");# J; F# r; [0 M$ h& s/ ~
- }4 n& r0 V p6 ^# Z$ ^" }
- else$ b' K* P1 w. M' E7 q! J
- {
" N$ ^( q0 f+ R" q3 L5 S2 { - printf("FIFO没空!!!\n");2 L! { }/ o3 O% I) z3 v" `
- }& [5 ? d2 s2 e2 L6 c
& m; k. H( C" J/ \9 s& q- ~; W- printf("\n");! C; j5 O2 c4 Z8 p- s. _% g( C( C
- ~8 z- n8 @+ A; y% D; s
- for(;;)' m+ w! {' V( @ x
- {
5 ` ~! F, S$ |; U) J - {
k5 V- {. _3 t! F9 I - if(RingBuffer_In(fifo, data, sizeof(data) / 2) > 0)% Y. S# p8 l/ Y0 d1 @; x
- {- K5 E, ~ A }$ e5 v* e9 q
- printf("FIFO写入成功,FIFO大小:%d,使用大小:%d,剩余大小:%d\n",1 X! O: U' V# M1 D( w% b
- RingBuffer_Size(fifo), RingBuffer_Len(fifo), RingBuffer_Avail(fifo));/ O6 @+ H0 z1 k5 V
- }' X) X t- K; L# P7 K0 U4 G4 E
- else
4 S& o+ D! c3 z5 ^, u4 Q - {
8 v2 q2 t8 E9 m+ D1 P - printf("FIFO写入失败,FIFO大小:%d,使用大小:%d,剩余大小:%d\n",
) F# _( E) X' p- [0 m) m - RingBuffer_Size(fifo), RingBuffer_Len(fifo), RingBuffer_Avail(fifo));1 O' n( v! |) l
- }
5 J' |0 q' ^2 \
/ Z, M5 p- [; f ?" x& f* X2 ?- if(RingBuffer_IsFull(fifo) == true)4 `) w# u; X0 F% r6 m# ~
- {1 x" a" p O, H; x! T3 Z% W$ ^2 p' x
- printf("FIFO满了!!!\n");; l O% |2 w: t- ~, N
- }. X0 @$ b+ O B1 V2 P' \
- else, |3 y$ L o1 [/ n5 Q1 M$ O) w
- {* K* d& w* w# @
- printf("FIFO没满!!!\n");9 P1 Z6 T$ _2 ~4 [0 D
- }" \& g) C9 I# \+ }+ R- p1 W0 F
- 0 B4 \* Y% m& f( i1 x0 |1 X+ P
- if(RingBuffer_IsEmpty(fifo) == true)
: s1 \3 P/ `! |' r4 W$ K - {
2 ^) J( v8 F' A: Q! b - printf("FIFO空了!!!\n");
3 c- {6 k7 E9 x+ `3 }# Y - }
/ Z4 k1 @) \, U* W( h; ]9 a - else
+ p: Z$ j- M4 {$ o$ R9 P8 ` - { Y. q0 d6 W2 [/ L
- printf("FIFO没空!!!\n");
% D) N: i4 L1 Z, n - }, e) {/ H$ z2 l; u! L
- }
9 W x( S1 m/ [8 h# S3 u - 3 ^+ e. W, U% ~" @4 T( E' @* q$ I# R
- printf("\n");
; c7 X' m1 M' y9 @5 f$ f/ E3 _
* _( N8 o& W9 `3 R: C9 m- {
' X: Y% g( N! i5 L; r: d+ ]! D - uint8_t rdata[64] = {0};; G/ \3 ]6 m' X" S% R% S
- uint8_t len = RingBuffer_Out(fifo, rdata, sizeof(rdata));
; \0 a( y& O8 g* y2 S% D! R
. W q) ?7 |- E* a' S3 h) K g- if(len > 0)7 o' n# E0 Y1 r
- {
4 b7 s. m9 s; d5 ?( }' [ - printf("从FIFO中读出的数据,长度:%d\n", len);
. F9 y$ t1 v, E% z8 x6 Q - 5 G: A/ x6 O( M
- for(int i = 0; i < len; i++)8 z) G4 K5 Q2 i9 F; o1 S" p& q
- {
% [+ y" U% S. o4 \( w3 \6 | - printf("%d ", rdata[i]);
6 Q6 U8 h* i/ Y9 s1 s3 a - }
7 h: Q7 g/ A/ w
. z/ G `% L5 c9 {" ^- printf("\n");& a& O' h" k* ^. a
- & u* ^/ A' J N! X* s" V! L
- printf("FIFO读取成功,FIFO大小:%d,使用大小:%d,剩余大小:%d\n",6 L6 {8 d2 r* Q
- RingBuffer_Size(fifo), RingBuffer_Len(fifo), RingBuffer_Avail(fifo));
! |3 X) k. W/ p$ j - }" G7 f& f* k+ R- ~( A
- else
+ a, K. R& O3 f# z# n: |) e ^ - {
; u2 t5 G4 r6 A) a - printf("FIFO读取失败,FIFO大小:%d,使用大小:%d,剩余大小:%d\n",- u) j1 u+ t# u; \) |
- RingBuffer_Size(fifo), RingBuffer_Len(fifo), RingBuffer_Avail(fifo));
) V; u- s# H0 }* B' f$ ] - }& U: d5 L; Z# w7 P
# j; O3 E+ G) G( p2 n- if(RingBuffer_IsFull(fifo) == true)
5 J( y2 o' J; t" B* L - {
7 `" Z- m. g1 q4 J; C9 x/ c; f8 ? - printf("FIFO满了!!!\n");
/ U. D# f! Q" \& c" [ - } T+ c% B5 x) h5 D8 w
- else! ?( @4 ]4 i1 O7 Q
- {0 g2 n" X% Y8 V5 w. |# i
- printf("FIFO没满!!!\n");/ K; g* n. \, d- C; P- i) S
- }( ]9 B. ?" y7 D' }' k. ~
- 3 v) o9 v# j! q
- if(RingBuffer_IsEmpty(fifo) == true)" g5 Z+ ?3 f- U2 p7 C
- {+ K+ q9 U8 M5 Z! a4 } u
- printf("FIFO空了!!!\n");6 \9 @* P) @" Q) O" I4 \; u1 L( Z
- }
/ d8 X1 b; u- g0 q& E% s - else
$ y* o. ]: [ f( K, Z# w F - {" D; o; J0 \/ j$ Z' p
- printf("FIFO没空!!!\n");) J Z" r! o* ~' S8 x% w
- }
, A( I! U& C1 L' ]9 o# l! Q - }+ a+ {+ {9 O1 {/ e1 {: Q* ?
, {& t& k* X8 g4 \# _- printf("\n");' z: h# {: A& _" `. `2 |* r/ z0 c
8 v& N5 W7 q: \- {) e- H3 H& u2 I% R) p1 O0 K' l
- RingBuffer_Reset(fifo);4 |3 A7 L% Q* ?: ~
- printf("FIFO清空成功,FIFO大小:%d,使用大小:%d,剩余大小:%d\n",
. r9 O( u* ?* m2 } - RingBuffer_Size(fifo), RingBuffer_Len(fifo), RingBuffer_Avail(fifo));
- r z( C/ O! c% Y4 B: ?6 j! l- n
5 E u. n: `0 P+ ^; n- if(RingBuffer_IsFull(fifo) == true)& `" t. m" F, g% ?& A: r
- {
6 L3 z9 a7 E% q4 c0 {- \& x - printf("FIFO满了!!!\n");8 @1 |4 \! ?; \# }3 {/ V
- }: t7 C+ R m0 B; v" V
- else, m4 B. |6 _; @& U! l" ]: `8 {
- {, _- O# ]( G$ x5 A% @
- printf("FIFO没满!!!\n");! G7 k& a& S9 }3 l8 `) v: g
- }4 j& o! s/ D2 f2 k8 H
- 1 g, |% z9 y# g* x6 g
- if(RingBuffer_IsEmpty(fifo) == true)5 L4 c7 g6 q$ y6 l" J" s6 G s, [
- {
2 ~! e+ W! C( ? - printf("FIFO空了!!!\n");
+ u0 Y" w- J* J - }" K8 B k* b1 S
- else4 q/ Y% s T9 V3 m; q" X j: k& y
- {
, ~) g- [% K2 @0 o' P4 B( p - printf("FIFO没空!!!\n");
+ _' ]- I. K/ C8 d2 }4 Y - }
. P" u, T; ^- u( u! L9 w5 v - }
+ }0 ?# U$ Y; R& }- G& r
" X+ B ^- L+ I8 w: M; ~- printf("\n");
4 }1 p8 `# ^1 n
3 V! ?2 ]# f/ ^! a& W- {% l& T- N$ L/ L O: @. N
- if(RingBuffer_In(fifo, data, sizeof(data)) > 0)
{) i+ ?& b5 M0 I } - {
- t# r2 v' D+ C, l# G$ Q% b - printf("FIFO写入成功,FIFO大小:%d,使用大小:%d,剩余大小:%d\n",
! P1 L* n" M* ]+ i* p2 j - RingBuffer_Size(fifo), RingBuffer_Len(fifo), RingBuffer_Avail(fifo));. o: c" Q' k# A7 l
- }% O' D. r% }3 ?# z9 w
- else0 D* f" ~6 n7 a. Z
- {
$ V$ w8 E7 N1 U1 b( U1 ]. S. { - printf("FIFO写入失败,FIFO大小:%d,使用大小:%d,剩余大小:%d\n",
( M2 y6 g* ` H/ O# J - RingBuffer_Size(fifo), RingBuffer_Len(fifo), RingBuffer_Avail(fifo));9 c9 Y, @1 n% ~' p; R: u/ N
- }
7 ?# l) q. B4 H% D3 ~% ^$ W& e - 2 }4 M3 b) T: w/ q) t5 ]$ v
- if(RingBuffer_IsFull(fifo) == true)2 t+ G9 d0 z% S+ H1 {( K* }2 D
- {
& \2 F& `) r, v& M+ ?+ F" t9 N7 k2 S! U - printf("FIFO满了!!!\n");+ Z9 ~. v2 @; ~7 U# e
- }" j% x+ m: o( O3 ~& [$ [# u! Z
- else, }+ m, N; X7 c' ^
- {' K) r5 H0 n5 \5 x9 i" S
- printf("FIFO没满!!!\n");8 M( L$ i" K9 q
- }
$ z1 _3 Q, n/ Q3 Y" | X! K - 8 A! e- l& W3 `$ a
- if(RingBuffer_IsEmpty(fifo) == true)7 [) r' e' |# `+ X
- {7 J* b4 I# c! w# o
- printf("FIFO空了!!!\n");* }# M1 e! V0 Q8 C9 |
- }
' Z; J3 ?9 c& i. A$ e - else$ W. V. |4 `& n# b8 \9 h# K
- {
% E( K1 Z. V( S3 |4 O - printf("FIFO没空!!!\n");* R5 J3 ~0 n E, Y
- }8 B% |& S9 P1 p/ Q C
- }
. |1 l5 R& x. p2 b9 a. I4 k/ W - & s; u4 L* e9 N
- printf("\n");0 V7 W) ]$ Z, G) x# I
9 M( Z& ^8 G0 w8 [# B s3 A3 ^- {
4 `# \; k8 R1 t3 B- X - if(RingBuffer_In(fifo, data, sizeof(data)) > 0)
( T" G2 {: \3 }* y; P( U - {% w& n U+ y* x7 |' S
- printf("FIFO写入成功,FIFO大小:%d,使用大小:%d,剩余大小:%d\n",! [, r& @3 i- n9 ~! A
- RingBuffer_Size(fifo), RingBuffer_Len(fifo), RingBuffer_Avail(fifo));: l' k9 N' D! R% u3 a5 {
- }
. J& z: I: \) c - else
, x" e! ]2 c- o! m# u' ~5 q - {
/ G, b2 w6 H; h b* y - printf("FIFO写入失败,FIFO大小:%d,使用大小:%d,剩余大小:%d\n",2 x6 z1 U: F( v' o5 ]
- RingBuffer_Size(fifo), RingBuffer_Len(fifo), RingBuffer_Avail(fifo));
; W* Y$ ?( I( ~( A0 p+ J - }
0 X: k1 J4 l6 @0 r2 d! V - + U1 n; b/ k1 w9 _5 A- P
- if(RingBuffer_IsFull(fifo) == true)0 a9 i9 P6 I& q4 H0 F% o; F, q
- {
* a7 n3 h" X3 i" X - printf("FIFO满了!!!\n"); Y' d7 s5 {, P" X3 W
- }
7 m9 W3 F9 M/ M! N7 z: q( w( |1 b - else# m2 ]9 z4 M9 B( R- K( C) E% E
- {
/ J7 R# a- y$ C% G/ v: P) j - printf("FIFO没满!!!\n");
* H2 {/ }1 A. E9 z# ? - }
, A+ p) D7 Y H7 U
8 } x) W2 c, Z8 ?0 P! w- if(RingBuffer_IsEmpty(fifo) == true)
) f6 W" T( w" r! j) z - {( \/ ]. E* q |. q/ I( ^
- printf("FIFO空了!!!\n");! ]1 u5 q) ^; ?' v' S( p2 G
- }& g4 }9 ^; \/ }; V5 |9 }6 E
- else
" q- }5 l& m, i1 r: _4 D5 n) D - {0 [0 h/ E C1 |" |% G# { }
- printf("FIFO没空!!!\n");
7 J" c, ^" W8 x! L6 J: t- E- z - }- {& _9 o0 w- Y. h0 n; h
- }
/ _, e5 a {8 S6 o5 q - - C l) A: l4 a. ?3 Q
- printf("\n");7 k* F* o* X! A$ d1 y4 R. _" S' W
- 7 u8 N5 x) {% c/ P5 }
- {
6 I* I8 k6 D$ B' A - uint8_t rdata[256] = {0};
6 O- N5 T) v' r8 D$ [# G% F - uint16_t len = RingBuffer_Out(fifo, rdata, sizeof(rdata));2 z( P( E8 e) f
- 5 l2 R0 b2 \6 r" S3 z! \2 }+ s3 _0 U
- if(len > 0)) e" w1 w: H/ }) h
- {
) n* K* ]4 P9 N& Z# k+ z9 r' Z - printf("从FIFO中读出的数据,长度:%d\n", len);
1 o8 J. e: U% d% v! A V% y1 [ - ; e1 k0 h& F$ @ p9 `
- for(int i = 0; i < len; i++)
: \, O4 C* { R - {2 z( ^4 _; D8 ^9 Y
- printf("%d ", rdata[i]);
7 ?2 I. _0 k9 s: f1 ` - }
# G; h8 }, j4 V/ u - / ~9 E. Y" a: P2 R- |
- printf("\n");: H9 {1 q, H+ O9 w0 {. ~; ]* V
- 7 I2 S2 t$ g7 e2 s3 b
- printf("FIFO读取成功,FIFO大小:%d,使用大小:%d,剩余大小:%d\n",3 X; p S, j9 p3 \; V+ {2 I' X9 ?) G2 d1 t
- RingBuffer_Size(fifo), RingBuffer_Len(fifo), RingBuffer_Avail(fifo));9 x8 w! t+ U5 j* X
- }+ i! Y0 B: a/ D6 G
- else
/ F4 B) t& b, h* O - {/ u. P. v; b, E r s4 z8 g0 c0 R
- printf("FIFO读取失败,FIFO大小:%d,使用大小:%d,剩余大小:%d\n",6 `5 J. c; c9 r$ A4 b, Q2 t
- RingBuffer_Size(fifo), RingBuffer_Len(fifo), RingBuffer_Avail(fifo));; `/ w" B" X, e7 b
- }
" }% t+ p. [( J. m - k, K8 ` X* u* _7 C8 v# B9 V9 m
- if(RingBuffer_IsFull(fifo) == true)+ L$ ~' j6 G7 C
- {
- V% C6 V" X0 @/ h' H/ Z - printf("FIFO满了!!!\n");
3 i5 C9 ^- c6 A, E. R - }
8 R5 q: f8 H2 B5 N; O3 [& C! k - else) Y# Z1 x. W0 y5 k4 t% x
- { e2 V. Q8 W4 f/ b9 s7 J1 }
- printf("FIFO没满!!!\n");# i, H+ u9 `( b% c k8 i/ C* @
- }4 W" L1 k! o$ J
- 4 f: g |, {4 j1 W
- if(RingBuffer_IsEmpty(fifo) == true)
- q5 Y, W6 M& }3 a' Z6 S) \0 G - {! S6 a) r# O# R0 G3 v4 c
- printf("FIFO空了!!!\n");
J: ^! c1 p `0 O9 S& D& k: G8 M - }0 J) Z4 s* P7 @* S
- else6 x& A" t P' I
- {
5 g+ N* i- M! s' A, S' t1 K; I - printf("FIFO没空!!!\n");9 m$ Z% ?: n; l# ?( F2 U0 R
- }
) Y5 [: X( [. l9 B) a - }! J- v0 N9 a/ i) ~# o ~* T
) X6 @' I& J' Z3 F- printf("\n");; c+ P9 e9 ?& T! ~. N- X* W
- " f" i: D, R/ X/ t
- {
4 g! ^/ K }% \* a' p( l. Z - uint8_t rdata[256] = {0};
8 s3 ?3 i% ?/ A ]0 Q - uint16_t len = RingBuffer_Out(fifo, rdata, sizeof(rdata));
7 X- ^# b9 G& P" F - * {! R: x9 ?( c6 S9 H6 V
- if(len > 0)8 ~6 j; t: J; ^0 r. u" @1 M
- {
2 j {3 h! ~' @ - printf("从FIFO中读出的数据,长度:%d\n", len);
, t. `" n5 r9 s/ N
* [8 e& g _7 s% A' n8 H6 i- for(int i = 0; i < len; i++)
+ ^$ P/ }4 T/ A& u- v6 L* V - {
, v* T0 c8 n9 `7 @+ ? - printf("%d ", rdata[i]);
2 p7 H& m; @$ v9 n; d+ p - }
5 I' o; |( ^+ g' {" x
0 u6 q: g, e2 q+ C3 U7 F$ f% J2 _- printf("\n");! w5 @! Z4 j8 i2 n: Q4 Y! B, v, m
9 w3 @4 p6 {8 v M7 r- printf("FIFO读取成功,FIFO大小:%d,使用大小:%d,剩余大小:%d\n",. d4 @" _7 s1 V5 @- a
- RingBuffer_Size(fifo), RingBuffer_Len(fifo), RingBuffer_Avail(fifo));! o; V# O' L2 c
- }! u! F. ?1 J* M' t; H9 B5 G2 E
- else" {" J+ ~* K( @# O* e; C
- {2 m8 }. m) f3 O3 |% t# h+ C# t1 \
- printf("FIFO读取失败,FIFO大小:%d,使用大小:%d,剩余大小:%d\n",
8 F$ R3 Y9 j6 X, t+ [, n- D6 L8 P - RingBuffer_Size(fifo), RingBuffer_Len(fifo), RingBuffer_Avail(fifo)); k3 T0 _% |! @
- }
' u; j. z& Y" t8 l3 Q* s+ H
/ [9 K0 W/ V( H9 S, z/ @- if(RingBuffer_IsFull(fifo) == true)! o7 ?" E) y C$ Q0 ^ X0 e& J
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- printf("FIFO满了!!!\n");
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- printf("FIFO没满!!!\n");) [% c! j1 i |$ c0 R
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- {
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- printf("FIFO没空!!!\n");
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- printf("\n\n\n");
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- }
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- else
& u1 C* Q; [. l4 I% m - {
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- }
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- {
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- }
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复制代码
2 n9 }& c% w" L2 V9 H7 T0 n! j9 D3,运行效果
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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。
谢谢分享
以前搞过ram模拟fifo,还没用过环形fifo,学习学习。! |. C: x0 N& I# A
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