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Update intro text

This commit is contained in:
Holger Vogt 2021-07-12 23:35:00 +02:00
parent d71821fd36
commit 677ec1a094
1 changed files with 16 additions and 13 deletions
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29
src/spicelib/devices/cpl/cplhash.c
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@ -1,20 +1,23 @@
/**********
Copyright 2021 The ngspice team All rights
reserved.
Author: 2021 Holger Vogt
3-clause BSD license
**********/
/* This is a test file including a local garbage collector and removal.
It might be especially useful, if the ngspice shared library (.dll or .so)
is loaded and unloaded several times by a master program.
At ngspice initialization mem_init() is called setting up a hash table
It might be especially useful, because cpl transmission lines have
several memory leaks during runtime in difficult to control process
sequence..
At initialization in CPLsetup() mem_init() is called setting up a hash table
to store memory addresses.
Each time calloc() is called, the resulting address is stored.
Each time free() is called, the address is removed.
Each time TMALLOC is called, the resulting address is stored.
Each time tfree() is called, the address is removed.
For realloc(), the old address is deleted, the new one is stored,
if there is a change in the address.
Upon exiting the program, mem_delete() is called, deleting all memory
at addresses still in the hash table, then the hash table itself is removed.
The Windows dll uses DllMain() to call mem_delete() exit, the LINUX .so
will use void __attribute__((destructor)) mem_delete(void) or atexit()
(both are not tested so far).
The master program has to make copies of all the data that have to be kept
for further use before detaching the shared lib! */
CPLunsetup() calls mem_delete(). */
#include "ngspice/ngspice.h"
#include "ngspice/iferrmsg.h"
@ -58,7 +61,7 @@ void mem_init(void) {
}
/* add to counter and hash table if memory is allocated */
static int memsaved(void *ptr) {
int memsaved(void *ptr) {
if (gc_is_on) {
gc_is_on = 0;
@ -77,7 +80,7 @@ static int memsaved(void *ptr) {
}
/* add to counter and remove from hash table if memory is deleted */
static void memdeleted(const void *ptr) {
void memdeleted(const void *ptr) {
if (gc_is_on) {
gc_is_on = 0;
if (nghash_delete_special(memory_table, (void*)ptr) == NULL) {