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preliminary first fork-safe version

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instead of allocating memory in the child, we now use the allocator
thread to do all the necessary allocations himself.
additionally we provide a clean API to query the ip <-> dns mapping.
these functions connect via a pipe to the allocator thread, and
exchange messages.

further cleanup is needed, but it seems to work so far.
thread-safety is not yet guaranteed.

closes #1
This commit is contained in:
rofl0r
2012-11-07 20:11:14 +01:00
parent 25afe98b20
commit d0abc93c74
10 changed files with 311 additions and 242 deletions
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34
src/core.h
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@ -26,41 +26,11 @@
#define BUFF_SIZE 8*1024 // used to read responses from proxies.
#define MAX_LOCALNET 64
typedef union {
unsigned char octet[4];
uint32_t as_int;
} ip_type;
#include "ip_type.h"
typedef struct {
uint32_t hash;
char* string;
} string_hash_tuple;
struct mallocinfo {
void * addr;
size_t oldsz;
size_t newsz;
};
typedef struct {
uint32_t counter;
uint32_t capa;
struct mallocinfo mi;
string_hash_tuple** list;
} internal_ip_lookup_table;
extern internal_ip_lookup_table *internal_ips;
#ifdef THREAD_SAFE
#include <pthread.h>
extern pthread_mutex_t internal_ips_lock;
#include "mutex.h"
extern pthread_mutex_t hostdb_lock;
# define MUTEX_LOCK(x) pthread_mutex_lock(x)
# define MUTEX_UNLOCK(x) pthread_mutex_unlock(x)
# define MUTEX_INIT(x,y) pthread_mutex_init(x, y)
#else
# define MUTEX_LOCK(x)
# define MUTEX_UNLOCK(x)
# define MUTEX_INIT(x,y)
#endif
/*error codes*/