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Always align PBUF_POOL_BUFSIZE, pbuf_init is not needed any more, minor changes to meet coding style requirements

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goldsimon 2007-06-17 14:36:19 +00:00
parent 96dc30dea2
commit 55bd48dc10
1 changed files with 14 additions and 10 deletions
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24
src/core/pbuf.c
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@ -72,7 +72,10 @@
#include "lwip/sys.h" #include "lwip/sys.h"
#include "arch/perf.h" #include "arch/perf.h"
#define SIZEOF_STRUCT_PBUF LWIP_MEM_ALIGN_SIZE(sizeof(struct pbuf)) #define SIZEOF_STRUCT_PBUF LWIP_MEM_ALIGN_SIZE(sizeof(struct pbuf))
/* Since the pool is created in memp, PBUF_POOL_BUFSIZE will be automatically
aligned there. Therefore, PBUF_POOL_BUFSIZE_ALIGNED can be used here. */
#define PBUF_POOL_BUFSIZE_ALIGNED LWIP_MEM_ALIGN_SIZE(PBUF_POOL_BUFSIZE)
/** /**
* Initializes the pbuf module. * Initializes the pbuf module.
@ -83,8 +86,7 @@
void void
pbuf_init(void) pbuf_init(void)
{ {
LWIP_ASSERT("pbuf_init: PBUF_POOL_BUFSIZE not aligned", /* nothing to do here */
(PBUF_POOL_BUFSIZE % MEM_ALIGNMENT) == 0);
} }
/** /**
@ -164,10 +166,11 @@ pbuf_alloc(pbuf_layer l, u16_t length, pbuf_flag flag)
/* the total length of the pbuf chain is the requested size */ /* the total length of the pbuf chain is the requested size */
p->tot_len = length; p->tot_len = length;
/* set the length of the first pbuf in the chain */ /* set the length of the first pbuf in the chain */
p->len = length > PBUF_POOL_BUFSIZE - LWIP_MEM_ALIGN_SIZE(offset)? PBUF_POOL_BUFSIZE - LWIP_MEM_ALIGN_SIZE(offset): length; p->len = (length > PBUF_POOL_BUFSIZE_ALIGNED - LWIP_MEM_ALIGN_SIZE(offset)) ?
PBUF_POOL_BUFSIZE_ALIGNED - LWIP_MEM_ALIGN_SIZE(offset) : length;
LWIP_ASSERT("check p->payload + p->len does not overflow pbuf", LWIP_ASSERT("check p->payload + p->len does not overflow pbuf",
((u8_t*)p->payload + p->len <= ((u8_t*)p->payload + p->len <=
(u8_t*)p + SIZEOF_STRUCT_PBUF + PBUF_POOL_BUFSIZE)); (u8_t*)p + SIZEOF_STRUCT_PBUF + PBUF_POOL_BUFSIZE_ALIGNED));
/* set reference count (needed here in case we fail) */ /* set reference count (needed here in case we fail) */
p->ref = 1; p->ref = 1;
@ -194,13 +197,13 @@ pbuf_alloc(pbuf_layer l, u16_t length, pbuf_flag flag)
LWIP_ASSERT("rem_len < max_u16_t",rem_len < 0xffff); LWIP_ASSERT("rem_len < max_u16_t",rem_len < 0xffff);
q->tot_len = (u16_t)rem_len; q->tot_len = (u16_t)rem_len;
/* this pbuf length is pool size, unless smaller sized tail */ /* this pbuf length is pool size, unless smaller sized tail */
q->len = rem_len > PBUF_POOL_BUFSIZE? PBUF_POOL_BUFSIZE: (u16_t)rem_len; q->len = (rem_len > PBUF_POOL_BUFSIZE_ALIGNED) ? PBUF_POOL_BUFSIZE_ALIGNED : (u16_t)rem_len;
q->payload = (void *)((u8_t *)q + SIZEOF_STRUCT_PBUF); q->payload = (void *)((u8_t *)q + SIZEOF_STRUCT_PBUF);
LWIP_ASSERT("pbuf_alloc: pbuf q->payload properly aligned", LWIP_ASSERT("pbuf_alloc: pbuf q->payload properly aligned",
((mem_ptr_t)q->payload % MEM_ALIGNMENT) == 0); ((mem_ptr_t)q->payload % MEM_ALIGNMENT) == 0);
LWIP_ASSERT("check p->payload + p->len does not overflow pbuf", LWIP_ASSERT("check p->payload + p->len does not overflow pbuf",
((u8_t*)p->payload + p->len <= ((u8_t*)p->payload + p->len <=
(u8_t*)p + SIZEOF_STRUCT_PBUF + PBUF_POOL_BUFSIZE)); (u8_t*)p + SIZEOF_STRUCT_PBUF + PBUF_POOL_BUFSIZE_ALIGNED));
q->ref = 1; q->ref = 1;
/* calculate remaining length to be allocated */ /* calculate remaining length to be allocated */
rem_len -= q->len; rem_len -= q->len;
@ -233,14 +236,15 @@ pbuf_alloc(pbuf_layer l, u16_t length, pbuf_flag flag)
/* only allocate memory for the pbuf structure */ /* only allocate memory for the pbuf structure */
p = memp_malloc(MEMP_PBUF); p = memp_malloc(MEMP_PBUF);
if (p == NULL) { if (p == NULL) {
LWIP_DEBUGF(PBUF_DEBUG | LWIP_DBG_TRACE | 2, ("pbuf_alloc: Could not allocate MEMP_PBUF for PBUF_%s.\n", flag == PBUF_ROM?"ROM":"REF")); LWIP_DEBUGF(PBUF_DEBUG | LWIP_DBG_TRACE | 2, ("pbuf_alloc: Could not allocate MEMP_PBUF for PBUF_%s.\n",
(flag == PBUF_ROM) ? "ROM" : "REF"));
return NULL; return NULL;
} }
/* caller must set this field properly, afterwards */ /* caller must set this field properly, afterwards */
p->payload = NULL; p->payload = NULL;
p->len = p->tot_len = length; p->len = p->tot_len = length;
p->next = NULL; p->next = NULL;
p->flags = (flag == PBUF_ROM? PBUF_FLAG_ROM: PBUF_FLAG_REF); p->flags = ((flag == PBUF_ROM) ? PBUF_FLAG_ROM : PBUF_FLAG_REF);
break; break;
default: default:
LWIP_ASSERT("pbuf_alloc: erroneous flag", 0); LWIP_ASSERT("pbuf_alloc: erroneous flag", 0);
@ -653,7 +657,7 @@ pbuf_dechain(struct pbuf *p)
} }
/* assert tot_len invariant: (p->tot_len == p->len + (p->next? p->next->tot_len: 0) */ /* assert tot_len invariant: (p->tot_len == p->len + (p->next? p->next->tot_len: 0) */
LWIP_ASSERT("p->tot_len == p->len", p->tot_len == p->len); LWIP_ASSERT("p->tot_len == p->len", p->tot_len == p->len);
return (tail_gone > 0? NULL: q); return ((tail_gone > 0) ? NULL : q);
} }
/** /**