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#include <linux/list.h>
#include <string.h>
#include <stdbool.h>
#ifdef DYNAMIC_DEBUG
static LIST_HEAD(debug_funcs);
struct debug_func_entry {
const char *name;
struct list_head list;
};
static struct debug_func_entry *lookup_entry(const char *func)
{
struct debug_func_entry *e, *entry = NULL;
list_for_each_entry(e, &debug_funcs, list) {
if (!strcmp(e->name, func)) {
entry = e;
break;
}
}
return entry;
}
bool __syslinux_debug_enabled(const char *func)
{
struct debug_func_entry *entry;
entry = lookup_entry(func);
if (entry)
return true;
return false;
}
static int __enable(const char *func)
{
struct debug_func_entry *entry;
entry = lookup_entry(func);
if (entry)
return 0; /* already enabled */
entry = malloc(sizeof(*entry));
if (!entry)
return -1;
entry->name = func;
list_add(&entry->list, &debug_funcs);
return 0;
}
static int __disable(const char *func)
{
struct debug_func_entry *entry;
entry = lookup_entry(func);
if (!entry)
return 0; /* already disabled */
list_del(&entry->list);
free(entry);
return 0;
}
/*
* Enable or disable debug code for function 'func'.
*/
int syslinux_debug(const char *func, bool enable)
{
int rv;
if (enable)
rv = __enable(func);
else
rv = __disable(func);
return rv;
}
#else
int syslinux_debug(const char *func, bool enable)
{
(void)func;
(void)enable;
printf("Dynamic debug unavailable\n");
return -1;
}
#endif /* DYNAMIC_DEBUG */
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