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Code Issues Releases Wiki Activity

use linked lists for items returned from loanout

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This commit is contained in:
Michael Graff
1999-05-14 23:19:12 +00:00
parent 438d7099d1
commit 70fd62761d
2 changed files with 60 additions and 31 deletions
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14
lib/dns/include/dns/message.h
View File

@@ -117,11 +117,12 @@ typedef struct {
int state;
unsigned int from_to_wire : 2;
unsigned int reserved;
unsigned int need_cctx_cleanup : 1;
unsigned int reserved; /* reserved space (render) */
isc_buffer_t *buffer;
dns_compress_t cctx;
isc_boolean_t need_cctx_cleanup;
isc_mem_t *mctx;
ISC_LIST(isc_dynbuffer_t) scratchpad;
@@ -129,10 +130,11 @@ typedef struct {
ISC_LIST(dns_msgblock_t) rdatas;
ISC_LIST(dns_msgblock_t) rdatasets;
ISC_LIST(dns_msgblock_t) rdatalists;
dns_name_t *nextname;
dns_rdata_t *nextrdata;
dns_rdataset_t *nextrdataset;
dns_rdatalist_t *nextrdatalist;
ISC_LIST(dns_name_t) freename;
ISC_LIST(dns_rdata_t) freerdata;
ISC_LIST(dns_rdataset_t) freerdataset;
ISC_LIST(dns_rdatalist_t) freerdatalist;
} dns_message_t;
dns_result_t

77
lib/dns/message.c
View File

@@ -185,7 +185,7 @@ currentbuffer(dns_message_t *msg)
static inline void
releasename(dns_message_t *msg, dns_name_t *name)
{
msg->nextname = name;
ISC_LIST_PREPEND(msg->freename, name, link);
}
static inline dns_name_t *
@@ -194,9 +194,9 @@ newname(dns_message_t *msg)
dns_msgblock_t *msgblock;
dns_name_t *name;
if (msg->nextname != NULL) {
name = msg->nextname;
msg->nextname = NULL;
name = ISC_LIST_HEAD(msg->freename);
if (name != NULL) {
ISC_LIST_UNLINK(msg->freename, name, link);
return (name);
}
@@ -219,7 +219,7 @@ newname(dns_message_t *msg)
static inline void
releaserdata(dns_message_t *msg, dns_rdata_t *rdata)
{
msg->nextrdata = rdata;
ISC_LIST_PREPEND(msg->freerdata, rdata, link);
}
static inline dns_rdata_t *
@@ -228,9 +228,9 @@ newrdata(dns_message_t *msg)
dns_msgblock_t *msgblock;
dns_rdata_t *rdata;
if (msg->nextrdata != NULL) {
rdata = msg->nextrdata;
msg->nextrdata = NULL;
rdata = ISC_LIST_HEAD(msg->freerdata);
if (rdata != NULL) {
ISC_LIST_UNLINK(msg->freerdata, rdata, link);
return (rdata);
}
@@ -253,7 +253,7 @@ newrdata(dns_message_t *msg)
static inline void
releaserdatalist(dns_message_t *msg, dns_rdatalist_t *rdatalist)
{
msg->nextrdatalist = rdatalist;
ISC_LIST_PREPEND(msg->freerdatalist, rdatalist, link);
}
static inline dns_rdatalist_t *
@@ -262,9 +262,9 @@ newrdatalist(dns_message_t *msg)
dns_msgblock_t *msgblock;
dns_rdatalist_t *rdatalist;
if (msg->nextrdatalist != NULL) {
rdatalist = msg->nextrdatalist;
msg->nextrdatalist = NULL;
rdatalist = ISC_LIST_HEAD(msg->freerdatalist);
if (rdatalist != NULL) {
ISC_LIST_UNLINK(msg->freerdatalist, rdatalist, link);
return (rdatalist);
}
@@ -288,7 +288,7 @@ newrdatalist(dns_message_t *msg)
static inline void
releaserdataset(dns_message_t *msg, dns_rdataset_t *rdataset)
{
msg->nextrdataset = rdataset;
ISC_LIST_PREPEND(msg->freerdataset, rdataset, link);
}
static inline dns_rdataset_t *
@@ -297,9 +297,9 @@ newrdataset(dns_message_t *msg)
dns_msgblock_t *msgblock;
dns_rdataset_t *rdataset;
if (msg->nextrdataset != NULL) {
rdataset = msg->nextrdataset;
msg->nextrdataset = NULL;
rdataset = ISC_LIST_HEAD(msg->freerdataset);
if (rdataset != NULL) {
ISC_LIST_UNLINK(msg->freerdataset, rdataset, link);
return (rdataset);
}
@@ -342,15 +342,10 @@ msginit(dns_message_t *m)
m->state = DNS_SECTION_ANY; /* indicate nothing parsed or rendered */
m->nextname = NULL;
m->nextrdata = NULL;
m->nextrdataset = NULL;
m->nextrdatalist = NULL;
m->reserved = 0;
m->buffer = NULL;
m->need_cctx_cleanup = ISC_FALSE;
m->need_cctx_cleanup = 0;
}
/*
@@ -364,6 +359,8 @@ msgreset(dns_message_t *msg, isc_boolean_t everything)
isc_dynbuffer_t *dynbuf, *next_dynbuf;
dns_rdataset_t *rds, *next_rds;
dns_name_t *name, *next_name;
dns_rdata_t *rdata;
dns_rdatalist_t *rdatalist;
unsigned int i;
/*
@@ -391,6 +388,32 @@ msgreset(dns_message_t *msg, isc_boolean_t everything)
* Clean up linked lists.
*/
/*
* Run through the free lists, and just unlink anything found there.
* The memory isn't lost since these are part of message blocks we
* have allocated.
*/
name = ISC_LIST_HEAD(msg->freename);
while (name != NULL) {
ISC_LIST_UNLINK(msg->freename, name, link);
name = ISC_LIST_HEAD(msg->freename);
}
rdata = ISC_LIST_HEAD(msg->freerdata);
while (rdata != NULL) {
ISC_LIST_UNLINK(msg->freerdata, rdata, link);
rdata = ISC_LIST_HEAD(msg->freerdata);
}
rdatalist = ISC_LIST_HEAD(msg->freerdatalist);
while (rdatalist != NULL) {
ISC_LIST_UNLINK(msg->freerdatalist, rdatalist, link);
rdatalist = ISC_LIST_HEAD(msg->freerdatalist);
}
rds = ISC_LIST_HEAD(msg->freerdataset);
while (rds != NULL) {
ISC_LIST_UNLINK(msg->freerdataset, rds, link);
rds = ISC_LIST_HEAD(msg->freerdataset);
}
dynbuf = ISC_LIST_HEAD(msg->scratchpad);
INSIST(dynbuf != NULL);
if (!everything) {
@@ -459,7 +482,7 @@ msgreset(dns_message_t *msg, isc_boolean_t everything)
msgblock = next_msgblock;
}
if (msg->need_cctx_cleanup)
if (msg->need_cctx_cleanup == 1)
dns_compress_invalidate(&msg->cctx);
/*
@@ -498,6 +521,10 @@ dns_message_create(isc_mem_t *mctx, dns_message_t **msgp, unsigned int intent)
ISC_LIST_INIT(m->names);
ISC_LIST_INIT(m->rdatas);
ISC_LIST_INIT(m->rdatalists);
ISC_LIST_INIT(m->freename);
ISC_LIST_INIT(m->freerdata);
ISC_LIST_INIT(m->freerdataset);
ISC_LIST_INIT(m->freerdatalist);
dynbuf = NULL;
iresult = isc_dynbuffer_allocate(mctx, &dynbuf, SCRATCHPAD_SIZE,
@@ -1075,7 +1102,7 @@ dns_message_renderbegin(dns_message_t *msg, isc_buffer_t *buffer)
result = dns_compress_init(&msg->cctx, -1, msg->mctx);
if (result != DNS_R_SUCCESS)
return (result);
msg->need_cctx_cleanup = ISC_TRUE;
msg->need_cctx_cleanup = 1;
/*
* Reserve enough space for the header in this buffer.
@@ -1254,7 +1281,7 @@ dns_message_renderend(dns_message_t *msg)
msg->buffer = NULL; /* forget about this buffer only on success XXX */
dns_compress_invalidate(&msg->cctx);
msg->need_cctx_cleanup = ISC_FALSE;
msg->need_cctx_cleanup = 0;
return (DNS_R_SUCCESS);
}