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More efficient allocate of ivl_nexus_t objects.

This commit is contained in:
steve 2007-03-26 20:32:47 +00:00
parent 9e21880cdc
commit 8856c07d88
2 changed files with 40 additions and 3 deletions
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32
t-dll.cc
View File

@ -17,7 +17,7 @@
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
*/
#ifdef HAVE_CVS_IDENT
#ident "$Id: t-dll.cc,v 1.168 2007/03/26 18:17:51 steve Exp $"
#ident "$Id: t-dll.cc,v 1.169 2007/03/26 20:32:47 steve Exp $"
#endif
# include "config.h"
@ -102,6 +102,31 @@ inline const char*dlerror(void)
{ return strerror( errno ); }
#endif
/*
* The custom new operator for the ivl_nexus_s type allows us to
* allocate nexus objects in blocks. There are generally lots of them
* permanently allocated, and allocating them in blocks reduces the
* allocation overhead.
*/
static struct ivl_nexus_s * nexus_pool_ptr = 0;
static int nexus_pool_remaining = 0;
static const size_t NEXUS_POOL_SIZE = 4096;
void* ivl_nexus_s::operator new(size_t s)
{
assert(s == sizeof(struct ivl_nexus_s));
if (nexus_pool_remaining <= 0) {
nexus_pool_ptr = new struct ivl_nexus_s[NEXUS_POOL_SIZE];
nexus_pool_remaining = NEXUS_POOL_SIZE;
}
struct ivl_nexus_s*tmp = nexus_pool_ptr;
nexus_pool_ptr += 1;
nexus_pool_remaining -= 1;
return tmp;
}
inline static const char *basename(ivl_scope_t scope, const char *inst)
{
inst += strlen(ivl_scope_name(scope));
@ -231,7 +256,7 @@ ivl_signal_t dll_target::find_signal(ivl_design_s &des, const NetNet*net)
ivl_scope_t scope = find_scope(des, net->scope());
assert(scope);
const char*nname = net->name();
perm_string nname = net->name();
for (unsigned idx = 0 ; idx < scope->nsigs_ ; idx += 1) {
if (strcmp(scope->sigs_[idx]->name_, nname) == 0)
@ -2200,6 +2225,9 @@ extern const struct target tgt_dll = { "dll", &dll_target_obj };
/*
* $Log: t-dll.cc,v $
* Revision 1.169 2007/03/26 20:32:47 steve
* More efficient allocate of ivl_nexus_t objects.
*
* Revision 1.168 2007/03/26 18:17:51 steve
* Remove pretense of general use for t_cookie.
*

11
t-dll.h
View File

@ -19,7 +19,7 @@
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
*/
#ifdef HAVE_CVS_IDENT
#ident "$Id: t-dll.h,v 1.140 2007/03/26 16:51:49 steve Exp $"
#ident "$Id: t-dll.h,v 1.141 2007/03/26 20:32:47 steve Exp $"
#endif
# include "target.h"
@ -477,12 +477,18 @@ struct ivl_nexus_ptr_s {
# define __NEXUS_PTR_CON 2
# define __NEXUS_PTR_LPM 3
/*
* NOTE: ONLY allocat ivl_nexus_s objects with the included "new" operator.
*/
struct ivl_nexus_s {
unsigned nptr_;
struct ivl_nexus_ptr_s*ptrs_;
const Nexus*nexus_;
const char*name_;
void*private_data;
void* operator new (size_t s);
void operator delete(void*obj, size_t s); // Not implemented
};
/*
@ -670,6 +676,9 @@ struct ivl_statement_s {
/*
* $Log: t-dll.h,v $
* Revision 1.141 2007/03/26 20:32:47 steve
* More efficient allocate of ivl_nexus_t objects.
*
* Revision 1.140 2007/03/26 16:51:49 steve
* do not calculate nexus name unless needed.
*