LiZongdi
/
robot
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity
Browse Source

【主线待合、重要修改】环形缓冲区现在支持原子操作

master
Lizongdi 3 weeks ago
parent
db56c201e5
commit
d126befb64
3 changed files with 204 additions and 290 deletions
Whitespace
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
Split View
Diff Options
Show Stats Download Patch File Download Diff File
  1. 26
      library/common/include/common.h
  2. 17
      library/ringbuffer/include/ringbuffer.h
  3. 441
      library/ringbuffer/ringbuffer.c

26
library/common/include/common.h
View File

@ -11,6 +11,32 @@
#define RD_NULL -2 //对象为空
#define RD_INVALUE -3 //非法参数
/* 原子操作跨平台要兼容 */
#if defined(__GNUC__) || defined(__clang__)
#define ATOMIC_LOAD(ptr, type, order) __atomic_load_n((ptr), (order))
#define ATOMIC_STORE(ptr, val, type, order) __atomic_store_n((ptr), (val), (order))
#define ATOMIC_ADD(ptr, val, type, order) __atomic_fetch_add((ptr), (val), (order))
#define ATOMIC_SUB(ptr, val, type, order) __atomic_fetch_sub((ptr), (val), (order))
#define ATOMIC_EXCH(ptr, val, type, order) __atomic_exchange_n((ptr), (val), (order))
#define ATOMIC_CMPXCHG(ptr, expected, desired, order) \
__atomic_compare_exchange_n((ptr), &(expected), (desired), 0, (order), (order))
#define ATOMIC_ORDER_RELAXED __ATOMIC_RELAXED
#define ATOMIC_ORDER_ACQUIRE __ATOMIC_ACQUIRE
#define ATOMIC_ORDER_RELEASE __ATOMIC_RELEASE
#else
/* 退化为普通访问（不安全，仅用于单线程或调试） */
#define ATOMIC_LOAD(ptr, type, order) (*(ptr))
#define ATOMIC_STORE(ptr, val, type, order) (*(ptr) = (val))
#define ATOMIC_ADD(ptr, val, type, order) (*(ptr) += (val))
#define ATOMIC_SUB(ptr, val, type, order) (*(ptr) -= (val))
#define ATOMIC_EXCH(ptr, val, type, order) ((*(ptr) = (val)), (val))
#define ATOMIC_CMPXCHG(ptr, expected, desired, order) \
((*(ptr) == (expected)) ? ((*(ptr) = (desired)), 1) : 0)
#define ATOMIC_ORDER_RELAXED 0
#define ATOMIC_ORDER_ACQUIRE 0
#define ATOMIC_ORDER_RELEASE 0
#endif
/* 跨平台弱符号宏定义 */
#if defined(_MSC_VER) || defined(WIN32)
/* Microsoft Visual C++ */

17
library/ringbuffer/include/ringbuffer.h
View File

@ -85,8 +85,6 @@ enum ERingBufState
RINGBUFFER_HALFFULL,
};
int rd_RingbufferDataLen(rd_ringbuf_t *rb);
/**
* @brief Get the buffer size of the ring buffer object.
*
@ -103,21 +101,6 @@ rd_inline int rd_RingbufferGetSize(rd_ringbuf_t *rb)
return rb->m_iBufsize;
}
rd_inline enum ERingBufState rd_RingbufferStatus(rd_ringbuf_t *rb)
{
if (rb->m_sReadIndex == rb->m_sWriteIndex)
{
if (rb->m_bReadMirror == rb->m_bWriteMirror)
return RINGBUFFER_EMPTY;
else
return RINGBUFFER_FULL;
}
return RINGBUFFER_HALFFULL;
}
/** return the size of empty space in rb */
#define rd_RingbufferSpaceLen(rb) ((rb)->m_iBufsize - rd_RingbufferDataLen(rb))
/*==============================================*
* project-wide global variables *
*----------------------------------------------*/

441
library/ringbuffer/ringbuffer.c
View File

@ -61,20 +61,52 @@
*/
void rd_RingbufferInit(rd_ringbuf_t *rb, char *pool, int size)
{
if(NULL == rb || NULL == pool || size <= 0)
{
if (!rb || !pool || size <= 0)
return;
}
/* initialize read and write index */
rb->m_bReadMirror = rb->m_sReadIndex = 0;
rb->m_bWriteMirror = rb->m_sWriteIndex = 0;
/* 原子方式初始化索引与镜像位 */
ATOMIC_STORE(&rb->m_sReadIndex, 0, unsigned short, ATOMIC_ORDER_RELAXED);
ATOMIC_STORE(&rb->m_sWriteIndex, 0, unsigned short, ATOMIC_ORDER_RELAXED);
ATOMIC_STORE(&rb->m_bReadMirror, 0, unsigned char, ATOMIC_ORDER_RELAXED);
ATOMIC_STORE(&rb->m_bWriteMirror, 0, unsigned char, ATOMIC_ORDER_RELAXED);
/* set buffer pool and size */
rb->m_pcBufPtr = pool;
rb->m_iBufsize = RD_ALIGN_DOWN(size, RD_ALIGN_SIZE);
}
/* 计算可写空间（原子读取索引） */
int rd_RingbufferSpaceLen(rd_ringbuf_t *rb)
{
if (!rb) return -1;
unsigned short wi = ATOMIC_LOAD(&rb->m_sWriteIndex, unsigned short, ATOMIC_ORDER_ACQUIRE);
unsigned short ri = ATOMIC_LOAD(&rb->m_sReadIndex, unsigned short, ATOMIC_ORDER_RELAXED);
unsigned char wb = ATOMIC_LOAD(&rb->m_bWriteMirror, unsigned char, ATOMIC_ORDER_ACQUIRE);
unsigned char rb_m = ATOMIC_LOAD(&rb->m_bReadMirror, unsigned char, ATOMIC_ORDER_RELAXED);
if (wb == rb_m) {
return rb->m_iBufsize - (wi - ri);
} else {
return ri - wi;
}
}
/* 获取环形缓冲区状态（读/写索引） */
static enum ERingBufState rd_RingbufferStatus(rd_ringbuf_t *rb)
{
if (!rb) return RINGBUFFER_EMPTY;
unsigned short wi = ATOMIC_LOAD(&rb->m_sWriteIndex, unsigned short, ATOMIC_ORDER_ACQUIRE);
unsigned short ri = ATOMIC_LOAD(&rb->m_sReadIndex, unsigned short, ATOMIC_ORDER_RELAXED);
unsigned char wb = ATOMIC_LOAD(&rb->m_bWriteMirror, unsigned char, ATOMIC_ORDER_ACQUIRE);
unsigned char rb_m = ATOMIC_LOAD(&rb->m_bReadMirror, unsigned char, ATOMIC_ORDER_RELAXED);
if (wi == ri) {
return (wb == rb_m) ? RINGBUFFER_EMPTY : RINGBUFFER_FULL;
}
return RINGBUFFER_HALFFULL;
}
/**
* @brief Put a block of data into the ring buffer. If the capacity of ring buffer is insufficient, it will discard out-of-range data.
*
@ -86,49 +118,29 @@ void rd_RingbufferInit(rd_ringbuf_t *rb, char *pool, int size)
*/
int rd_RingbufferPut(rd_ringbuf_t *rb, const char *ptr, int length)
{
int size = 0;
if(NULL == rb || NULL == ptr || length <= 0)
{
return RD_INVALUE;
}
if (!rb || !ptr || length <= 0) return RD_INVALUE;
/* whether has enough space */
size = rd_RingbufferSpaceLen(rb);
int space = rd_RingbufferSpaceLen(rb);
if (space == 0) return 0;
if (space < length) length = space;
/* no space */
if (size == 0)
{
return 0;
}
unsigned short wi = ATOMIC_LOAD(&rb->m_sWriteIndex, unsigned short, ATOMIC_ORDER_RELAXED);
unsigned char wb = ATOMIC_LOAD(&rb->m_bWriteMirror, unsigned char, ATOMIC_ORDER_RELAXED);
/* drop some data */
if (size < length)
{
length = size;
/* 写入不跨越尾部 */
if (rb->m_iBufsize - wi > length) {
RD_MEMCPY(&rb->m_pcBufPtr[wi], ptr, length);
wi += length;
} else {
int first = rb->m_iBufsize - wi;
RD_MEMCPY(&rb->m_pcBufPtr[wi], ptr, first);
RD_MEMCPY(&rb->m_pcBufPtr[0], ptr + first, length - first);
wb ^= 1; /* 翻转镜像位 */
wi = length - first;
}
if (rb->m_iBufsize - rb->m_sWriteIndex > length)
{
/* m_sReadIndex - m_sWriteIndex = empty space */
RD_MEMCPY(&rb->m_pcBufPtr[rb->m_sWriteIndex], ptr, length);
/* this should not cause overflow because there is enough space for
* length of data in current mirror */
rb->m_sWriteIndex += length;
return length;
}
RD_MEMCPY(&rb->m_pcBufPtr[rb->m_sWriteIndex],
&ptr[0],
rb->m_iBufsize - rb->m_sWriteIndex);
RD_MEMCPY(&rb->m_pcBufPtr[0],
&ptr[rb->m_iBufsize - rb->m_sWriteIndex],
length - (rb->m_iBufsize - rb->m_sWriteIndex));
/* we are going into the other side of the mirror */
rb->m_bWriteMirror ^= 1;
rb->m_sWriteIndex = length - (rb->m_iBufsize - rb->m_sWriteIndex);
ATOMIC_STORE(&rb->m_sWriteIndex, wi, unsigned short, ATOMIC_ORDER_RELEASE);
ATOMIC_STORE(&rb->m_bWriteMirror, wb, unsigned char, ATOMIC_ORDER_RELEASE);
return length;
}
@ -143,53 +155,38 @@ int rd_RingbufferPut(rd_ringbuf_t *rb, const char *ptr, int length)
*/
int rd_RingbufferPutForce(rd_ringbuf_t *rb, const char *ptr, int length)
{
int space_length;
if (NULL == rb || NULL == ptr || length <= 0)
{
return RD_INVALUE;
}
if (!rb || !ptr || length <= 0) return RD_INVALUE;
space_length = rd_RingbufferSpaceLen(rb);
if (length > rb->m_iBufsize)
{
ptr = &ptr[length - rb->m_iBufsize];
int space = rd_RingbufferSpaceLen(rb);
if (length > rb->m_iBufsize) {
ptr += length - rb->m_iBufsize;
length = rb->m_iBufsize;
}
if (rb->m_iBufsize - rb->m_sWriteIndex > length)
{
/* m_sReadIndex - m_sWriteIndex = empty space */
RD_MEMCPY(&rb->m_pcBufPtr[rb->m_sWriteIndex], ptr, length);
/* this should not cause overflow because there is enough space for
* length of data in current mirror */
rb->m_sWriteIndex += length;
if (length > space_length)
rb->m_sReadIndex = rb->m_sWriteIndex;
unsigned short wi = ATOMIC_LOAD(&rb->m_sWriteIndex, unsigned short, ATOMIC_ORDER_RELAXED);
unsigned char wb = ATOMIC_LOAD(&rb->m_bWriteMirror, unsigned char, ATOMIC_ORDER_RELAXED);
return length;
if (rb->m_iBufsize - wi > length) {
RD_MEMCPY(&rb->m_pcBufPtr[wi], ptr, length);
wi += length;
if (length > space) {
ATOMIC_STORE(&rb->m_sReadIndex, wi, unsigned short, ATOMIC_ORDER_RELEASE);
}
} else {
int first = rb->m_iBufsize - wi;
RD_MEMCPY(&rb->m_pcBufPtr[wi], ptr, first);
RD_MEMCPY(&rb->m_pcBufPtr[0], ptr + first, length - first);
wb ^= 1;
wi = length - first;
if (length > space) {
unsigned short ri = ATOMIC_LOAD(&rb->m_sReadIndex, unsigned short, ATOMIC_ORDER_RELAXED);
if (wi <= ri) wb ^= 1;
ATOMIC_STORE(&rb->m_sReadIndex, wi, unsigned short, ATOMIC_ORDER_RELEASE);
}
RD_MEMCPY(&rb->m_pcBufPtr[rb->m_sWriteIndex],
&ptr[0],
rb->m_iBufsize - rb->m_sWriteIndex);
RD_MEMCPY(&rb->m_pcBufPtr[0],
&ptr[rb->m_iBufsize - rb->m_sWriteIndex],
length - (rb->m_iBufsize - rb->m_sWriteIndex));
/* we are going into the other side of the mirror */
rb->m_bWriteMirror ^= 1;
rb->m_sWriteIndex = length - (rb->m_iBufsize - rb->m_sWriteIndex);
if (length > space_length)
{
if (rb->m_sWriteIndex <= rb->m_sReadIndex)
rb->m_bReadMirror ^= 1;
rb->m_sReadIndex = rb->m_sWriteIndex;
}
ATOMIC_STORE(&rb->m_sWriteIndex, wi, unsigned short, ATOMIC_ORDER_RELEASE);
ATOMIC_STORE(&rb->m_bWriteMirror, wb, unsigned char, ATOMIC_ORDER_RELEASE);
return length;
}
@ -204,49 +201,28 @@ int rd_RingbufferPutForce(rd_ringbuf_t *rb, const char *ptr, int length)
*/
int rd_RingbufferGet(rd_ringbuf_t *rb, char *ptr, int length)
{
int size;
if (NULL == rb || NULL == ptr || length <= 0)
{
return RD_INVALUE;
}
if (!rb || !ptr || length <= 0) return RD_INVALUE;
/* whether has enough data */
size = rd_RingbufferDataLen(rb);
int avail = rd_RingbufferDataLen(rb);
if (avail == 0) return 0;
if (length > avail) length = avail;
/* no data */
if (size == 0)
{
return 0;
}
unsigned short ri = ATOMIC_LOAD(&rb->m_sReadIndex, unsigned short, ATOMIC_ORDER_RELAXED);
unsigned char rb_m = ATOMIC_LOAD(&rb->m_bReadMirror, unsigned char, ATOMIC_ORDER_RELAXED);
/* less data */
if (size < length)
{
length = size;
if (rb->m_iBufsize - ri > length) {
RD_MEMCPY(ptr, &rb->m_pcBufPtr[ri], length);
ri += length;
} else {
int first = rb->m_iBufsize - ri;
RD_MEMCPY(ptr, &rb->m_pcBufPtr[ri], first);
RD_MEMCPY(ptr + first, &rb->m_pcBufPtr[0], length - first);
rb_m ^= 1;
ri = length - first;
}
if (rb->m_iBufsize - rb->m_sReadIndex > length)
{
/* copy all of data */
RD_MEMCPY(ptr, &rb->m_pcBufPtr[rb->m_sReadIndex], length);
/* this should not cause overflow because there is enough space for
* length of data in current mirror */
rb->m_sReadIndex += length;
return length;
}
RD_MEMCPY(&ptr[0],
&rb->m_pcBufPtr[rb->m_sReadIndex],
rb->m_iBufsize - rb->m_sReadIndex);
RD_MEMCPY(&ptr[rb->m_iBufsize - rb->m_sReadIndex],
&rb->m_pcBufPtr[0],
length - (rb->m_iBufsize - rb->m_sReadIndex));
/* we are going into the other side of the mirror */
rb->m_bReadMirror ^= 1;
rb->m_sReadIndex = length - (rb->m_iBufsize - rb->m_sReadIndex);
ATOMIC_STORE(&rb->m_sReadIndex, ri, unsigned short, ATOMIC_ORDER_RELEASE);
ATOMIC_STORE(&rb->m_bReadMirror, rb_m, unsigned char, ATOMIC_ORDER_RELEASE);
return length;
}
@ -262,38 +238,15 @@ int rd_RingbufferGet(rd_ringbuf_t *rb, char *ptr, int length)
*/
int rd_RingbufferPeak(rd_ringbuf_t *rb, char **ptr)
{
int size;
if (NULL == rb)
{
return RD_INVALUE;
}
if (!rb) return RD_INVALUE;
*ptr = NULL;
/* whether has enough data */
size = rd_RingbufferDataLen(rb);
int avail = rd_RingbufferDataLen(rb);
if (avail == 0) return 0;
/* no data */
if (size == 0)
{
return 0;
}
*ptr = &rb->m_pcBufPtr[rb->m_sReadIndex];
if((int)(rb->m_iBufsize - rb->m_sReadIndex) > size)
{
return size;
}
size = rb->m_iBufsize - rb->m_sReadIndex;
/* we are going into the other side of the mirror */
//rb->m_bReadMirror ^= 1;
//rb->m_sReadIndex = 0;
return size;
unsigned short ri = ATOMIC_LOAD(&rb->m_sReadIndex, unsigned short, ATOMIC_ORDER_RELAXED);
*ptr = &rb->m_pcBufPtr[ri];
return avail;
}
/**
@ -306,30 +259,22 @@ int rd_RingbufferPeak(rd_ringbuf_t *rb, char **ptr)
*/
int rd_RingbufferPutchar(rd_ringbuf_t *rb, const char ch)
{
if (NULL == rb)
{
return RD_INVALUE;
}
if (!rb) return RD_INVALUE;
if (!rd_RingbufferSpaceLen(rb)) return 0;
/* whether has enough space */
if (!rd_RingbufferSpaceLen(rb))
{
return 0;
}
unsigned short wi = ATOMIC_LOAD(&rb->m_sWriteIndex, unsigned short, ATOMIC_ORDER_RELAXED);
unsigned char wb = ATOMIC_LOAD(&rb->m_bWriteMirror, unsigned char, ATOMIC_ORDER_RELAXED);
rb->m_pcBufPtr[rb->m_sWriteIndex] = ch;
/* flip mirror */
if (rb->m_sWriteIndex == rb->m_iBufsize-1)
{
rb->m_bWriteMirror ^= 1;
rb->m_sWriteIndex = 0;
}
else
{
rb->m_sWriteIndex++;
rb->m_pcBufPtr[wi] = ch;
if (wi + 1 == rb->m_iBufsize) {
wb ^= 1;
wi = 0;
} else {
wi++;
}
ATOMIC_STORE(&rb->m_sWriteIndex, wi, unsigned short, ATOMIC_ORDER_RELEASE);
ATOMIC_STORE(&rb->m_bWriteMirror, wb, unsigned char, ATOMIC_ORDER_RELEASE);
return 1;
}
@ -343,37 +288,31 @@ int rd_RingbufferPutchar(rd_ringbuf_t *rb, const char ch)
*/
int rd_RingbufferPutcharForce(rd_ringbuf_t *rb, const char ch)
{
enum ERingBufState old_state;
if (!rb) return RD_INVALUE;
if (NULL == rb)
{
return RD_INVALUE;
}
old_state = rd_RingbufferStatus(rb);
rb->m_pcBufPtr[rb->m_sWriteIndex] = ch;
enum ERingBufState old_state = rd_RingbufferStatus(rb);
unsigned short wi = ATOMIC_LOAD(&rb->m_sWriteIndex, unsigned short, ATOMIC_ORDER_RELAXED);
unsigned char wb = ATOMIC_LOAD(&rb->m_bWriteMirror, unsigned char, ATOMIC_ORDER_RELAXED);
/* flip mirror */
if (rb->m_sWriteIndex == rb->m_iBufsize-1)
{
rb->m_bWriteMirror ^= 1;
rb->m_sWriteIndex = 0;
if (old_state == RINGBUFFER_FULL)
{
rb->m_bReadMirror ^= 1;
rb->m_sReadIndex = rb->m_sWriteIndex;
rb->m_pcBufPtr[wi] = ch;
if (wi + 1 == rb->m_iBufsize) {
wb ^= 1;
wi = 0;
if (old_state == RINGBUFFER_FULL) {
unsigned char rb_m = ATOMIC_LOAD(&rb->m_bReadMirror, unsigned char, ATOMIC_ORDER_RELAXED);
rb_m ^= 1;
ATOMIC_STORE(&rb->m_bReadMirror, rb_m, unsigned char, ATOMIC_ORDER_RELEASE);
ATOMIC_STORE(&rb->m_sReadIndex, wi, unsigned short, ATOMIC_ORDER_RELEASE);
}
}
else
{
rb->m_sWriteIndex++;
if (old_state == RINGBUFFER_FULL)
{
rb->m_sReadIndex = rb->m_sWriteIndex;
} else {
wi++;
if (old_state == RINGBUFFER_FULL) {
ATOMIC_STORE(&rb->m_sReadIndex, wi, unsigned short, ATOMIC_ORDER_RELEASE);
}
}
ATOMIC_STORE(&rb->m_sWriteIndex, wi, unsigned short, ATOMIC_ORDER_RELEASE);
ATOMIC_STORE(&rb->m_bWriteMirror, wb, unsigned char, ATOMIC_ORDER_RELEASE);
return 1;
}
@ -388,30 +327,22 @@ int rd_RingbufferPutcharForce(rd_ringbuf_t *rb, const char ch)
*/
int rd_RingbufferGetchar(rd_ringbuf_t *rb, char *ch)
{
if (NULL == rb)
{
return RD_INVALUE;
}
if (!rb) return RD_INVALUE;
if (!rd_RingbufferDataLen(rb)) return 0;
/* ringbuffer is empty */
if (!rd_RingbufferDataLen(rb))
{
return 0;
}
/* put byte */
*ch = rb->m_pcBufPtr[rb->m_sReadIndex];
unsigned short ri = ATOMIC_LOAD(&rb->m_sReadIndex, unsigned short, ATOMIC_ORDER_RELAXED);
unsigned char rb_m = ATOMIC_LOAD(&rb->m_bReadMirror, unsigned char, ATOMIC_ORDER_RELAXED);
if (rb->m_sReadIndex == rb->m_iBufsize-1)
{
rb->m_bReadMirror ^= 1;
rb->m_sReadIndex = 0;
}
else
{
rb->m_sReadIndex++;
*ch = rb->m_pcBufPtr[ri];
if (ri + 1 == rb->m_iBufsize) {
rb_m ^= 1;
ri = 0;
} else {
ri++;
}
ATOMIC_STORE(&rb->m_sReadIndex, ri, unsigned short, ATOMIC_ORDER_RELEASE);
ATOMIC_STORE(&rb->m_bReadMirror, rb_m, unsigned char, ATOMIC_ORDER_RELEASE);
return 1;
}
@ -424,27 +355,22 @@ int rd_RingbufferGetchar(rd_ringbuf_t *rb, char *ch)
*/
int rd_RingbufferDataLen(rd_ringbuf_t *rb)
{
switch (rd_RingbufferStatus(rb))
{
case RINGBUFFER_EMPTY:
return 0;
case RINGBUFFER_FULL:
return rb->m_iBufsize;
case RINGBUFFER_HALFFULL:
default:
{
int wi = rb->m_sWriteIndex, ri = rb->m_sReadIndex;
if (wi > ri)
{
return wi - ri;
if (!rb) return RD_INVALUE;
unsigned short wi = ATOMIC_LOAD(&rb->m_sWriteIndex, unsigned short, ATOMIC_ORDER_ACQUIRE);
unsigned short ri = ATOMIC_LOAD(&rb->m_sReadIndex, unsigned short, ATOMIC_ORDER_RELAXED);
unsigned char wb = ATOMIC_LOAD(&rb->m_bWriteMirror, unsigned char, ATOMIC_ORDER_ACQUIRE);
unsigned char rb_m = ATOMIC_LOAD(&rb->m_bReadMirror, unsigned char, ATOMIC_ORDER_RELAXED);
if (wi == ri) {
return (wb == rb_m) ? 0 : rb->m_iBufsize;
}
else
{
if (wb == rb_m) {
return wi - ri;
} else {
return rb->m_iBufsize - (ri - wi);
}
}
}
}
/**
@ -454,15 +380,11 @@ int rd_RingbufferDataLen(rd_ringbuf_t *rb)
*/
void rd_RingbufferReset(rd_ringbuf_t *rb)
{
if(NULL == rb)
{
return;
}
rb->m_bReadMirror = 0;
rb->m_sReadIndex = 0;
rb->m_bWriteMirror = 0;
rb->m_sWriteIndex = 0;
if (!rb) return;
ATOMIC_STORE(&rb->m_sReadIndex, 0, unsigned short, ATOMIC_ORDER_RELAXED);
ATOMIC_STORE(&rb->m_sWriteIndex, 0, unsigned short, ATOMIC_ORDER_RELAXED);
ATOMIC_STORE(&rb->m_bReadMirror, 0, unsigned char, ATOMIC_ORDER_RELAXED);
ATOMIC_STORE(&rb->m_bWriteMirror, 0, unsigned char, ATOMIC_ORDER_RELAXED);
}
/**
@ -474,32 +396,19 @@ void rd_RingbufferReset(rd_ringbuf_t *rb)
*/
rd_ringbuf_t *rd_RingbufferCreate(int size)
{
rd_ringbuf_t *rb;
char *pool;
if (size <= 0)
{
return NULL;
}
if (size <= 0) return NULL;
size = RD_ALIGN_DOWN(size, RD_ALIGN_SIZE);
rb = (rd_ringbuf_t *)RD_MALLOC(sizeof(rd_ringbuf_t));
if (rb == NULL)
{
goto exit;
}
rd_ringbuf_t *rb = (rd_ringbuf_t *)RD_MALLOC(sizeof(rd_ringbuf_t));
if (!rb) return NULL;
pool = (char *)RD_MALLOC(size);
if (pool == NULL)
{
char *pool = (char *)RD_MALLOC(size);
if (!pool) {
RD_FREE(rb);
rb = NULL;
goto exit;
return NULL;
}
rd_RingbufferInit(rb, pool, size);
exit:
rd_RingbufferInit(rb, pool, size);
return rb;
}
@ -510,11 +419,7 @@ exit:
*/
void rd_RingbufferDestroy(rd_ringbuf_t *rb)
{
if (NULL == rb)
{
return;
}
if (!rb) return;
RD_FREE(rb->m_pcBufPtr);
RD_FREE(rb);
}

Write Preview
Loading…
Cancel
Save