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[tables] Redefine methods for accessing linker tables

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Intel's C compiler (icc) chokes on the zero-length arrays that we
currently use as part of the mechanism for accessing linker table
entries.  Abstract away the zero-length arrays, to make a port to icc
easier.

Introduce macros such as for_each_table_entry() to simplify the common
case of iterating over all entries in a linker table.

Represent table names as #defined string constants rather than
unquoted literals; this avoids visual confusion between table names
and C variable or type names, and also allows us to force a
compilation error in the event of incorrect table names.
This commit is contained in:
Michael Brown
2009-03-12 19:41:40 +00:00
parent 3ed468e0c5
commit 1266d7902b
48 changed files with 239 additions and 264 deletions
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17
src/net/tcpip.c
View File

@@ -14,18 +14,6 @@
* TCP/IP transport-network layer interface
*/
/** Registered network-layer protocols that support TCP/IP */
static struct tcpip_net_protocol tcpip_net_protocols[0]
__table_start ( struct tcpip_net_protocol, tcpip_net_protocols );
static struct tcpip_net_protocol tcpip_net_protocols_end[0]
__table_end ( struct tcpip_net_protocol, tcpip_net_protocols );
/** Registered transport-layer protocols that support TCP/IP */
static struct tcpip_protocol tcpip_protocols[0]
__table_start ( struct tcpip_protocol, tcpip_protocols );
static struct tcpip_protocol tcpip_protocols_end[0]
__table_end ( struct tcpip_protocol, tcpip_protocols );
/** Process a received TCP/IP packet
*
* @v iobuf I/O buffer
@@ -48,7 +36,7 @@ int tcpip_rx ( struct io_buffer *iobuf, uint8_t tcpip_proto,
struct tcpip_protocol *tcpip;
/* Hand off packet to the appropriate transport-layer protocol */
for ( tcpip = tcpip_protocols; tcpip < tcpip_protocols_end; tcpip++ ) {
for_each_table_entry ( tcpip, TCPIP_PROTOCOLS ) {
if ( tcpip->tcpip_proto == tcpip_proto ) {
DBG ( "TCP/IP received %s packet\n", tcpip->name );
return tcpip->rx ( iobuf, st_src, st_dest, pshdr_csum );
@@ -76,8 +64,7 @@ int tcpip_tx ( struct io_buffer *iobuf, struct tcpip_protocol *tcpip_protocol,
struct tcpip_net_protocol *tcpip_net;
/* Hand off packet to the appropriate network-layer protocol */
for ( tcpip_net = tcpip_net_protocols ;
tcpip_net < tcpip_net_protocols_end ; tcpip_net++ ) {
for_each_table_entry ( tcpip_net, TCPIP_NET_PROTOCOLS ) {
if ( tcpip_net->sa_family == st_dest->st_family ) {
DBG ( "TCP/IP sending %s packet\n", tcpip_net->name );
return tcpip_net->tx ( iobuf, tcpip_protocol, st_src,