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//
// Network Buffer Subsystem (iobuffer)
//
//
// Author: Florian Wilkemeyer <fw@f-ws.de>
//
// Copyright (c) rAthena Project (www.rathena.org) - Licensed under GNU GPL
// For more information, see LICENCE in the main folder
//
//
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include "../common/cbasetypes.h"
#include "../common/atomic.h"
#include "../common/mempool.h"
#include "../common/showmsg.h"
#include "../common/raconf.h"
#include "../common/thread.h"
#include "../common/malloc.h"
#include "../common/core.h"
#include "../common/netbuffer.h"
//
// Buffers are available in the following sizes:
// 48, 192, 2048, 8192
// 65536 (inter server connects may use it for charstatus struct..)
//
///
// Implementation:
//
static volatile int32 l_nEmergencyAllocations = 0; // stats.
static sysint l_nPools = 0;
static sysint *l_poolElemSize = NULL;
static mempool *l_pool = NULL;
void netbuffer_init(){
char localsection[32];
raconf conf;
sysint i;
// Initialize Statistic counters:
l_nEmergencyAllocations = 0;
// Set localsection name according to running serverype.
switch(SERVER_TYPE){
case SERVER_TYPE_LOGIN: strcpy(localsection, "login-netbuffer"); break;
case SERVER_TYPE_CHAR: strcpy(localsection, "char-netbuffer"); break;
//case ATHENA_SERVER_INTER: strcpy(localsection, "inter-netbuffer"); break;
case SERVER_TYPE_MAP: strcpy(localsection, "map-netbuffer"); break;
default: strcpy(localsection, "unsupported_type"); break;
}
conf = raconf_parse("conf/network.conf");
if(conf == NULL){
ShowFatalError("Failed to Parse required Configuration (conf/network.conf)");
exit(EXIT_FAILURE);
}
// Get Values from config file
l_nPools = (sysint)raconf_getintEx(conf, localsection, "netbuffer", "num", 0);
if(l_nPools == 0){
ShowFatalError("Netbuffer (network.conf) failure - requires at least 1 Pool.\n");
exit(EXIT_FAILURE);
}
// Allocate arrays.
l_poolElemSize = (sysint*)aCalloc( l_nPools, sizeof(sysint) );
l_pool = (mempool*)aCalloc( l_nPools, sizeof(mempool) );
for(i = 0; i < l_nPools; i++){
int64 num_prealloc, num_realloc;
char key[32];
sprintf(key, "pool_%u_size", (uint32)i+1);
l_poolElemSize[i] = (sysint)raconf_getintEx(conf, localsection, "netbuffer", key, 4096);
if(l_poolElemSize[i] < 32){
ShowWarning("Netbuffer (network.conf) failure - minimum allowed buffer size is 32 byte) - fixed.\n");
l_poolElemSize[i] = 32;
}
sprintf(key, "pool_%u_prealloc", (uint32)i+1);
num_prealloc = raconf_getintEx(conf, localsection, "netbuffer", key, 150);
sprintf(key, "pool_%u_realloc_step", (uint32)i+1);
num_realloc = raconf_getintEx(conf, localsection, "netbuffer", key, 100);
// Create Pool!
sprintf(key, "Netbuffer %u", (uint32)l_poolElemSize[i]); // name.
// Info
ShowInfo("NetBuffer: Creating Pool %u (Prealloc: %u, Realloc Step: %u) - %0.2f MiB\n", l_poolElemSize[i], num_prealloc, num_realloc, (float)((sizeof(struct netbuf) + l_poolElemSize[i] - 32)* num_prealloc)/1024.0f/1024.0f);
//
// Size Calculation:
// struct netbuf + requested buffer size - 32 (because the struct already contains 32 byte buffer space at the end of struct)
l_pool[i] = mempool_create(key, (sizeof(struct netbuf) + l_poolElemSize[i] - 32), num_prealloc, num_realloc, NULL, NULL);
if(l_pool[i] == NULL){
ShowFatalError("Netbuffer: cannot create Pool for %u byte buffers.\n", l_poolElemSize[i]);
// @leak: clean everything :D
exit(EXIT_FAILURE);
}
}//
raconf_destroy(conf);
}//end: netbuffer_init()
void netbuffer_final(){
sysint i;
if(l_nPools > 0){
/// .. finalize mempools
for(i = 0; i < l_nPools; i++){
mempool_stats stats = mempool_get_stats(l_pool[i]);
ShowInfo("Netbuffer: Freeing Pool %u (Peak Usage: %u, Realloc Events: %u)\n", l_poolElemSize[i], stats.peak_nodes_used, stats.num_realloc_events);
mempool_destroy(l_pool[i]);
}
if(l_nEmergencyAllocations > 0){
ShowWarning("Netbuffer: did %u Emergency Allocations, please tune your network.conf!\n", l_nEmergencyAllocations);
l_nEmergencyAllocations = 0;
}
aFree(l_poolElemSize); l_poolElemSize = NULL;
aFree(l_pool); l_pool = NULL;
l_nPools = 0;
}
}//end: netbuffer_final()
netbuf netbuffer_get( sysint sz ){
sysint i;
netbuf nb = NULL;
// Search an appropriate pool
for(i = 0; i < l_nPools; i++){
if(sz <= l_poolElemSize[i]){
// match
nb = (netbuf)mempool_node_get(l_pool[i]);
nb->pool = i;
break;
}
}
// No Bufferpool found that mets there quirements?.. (thats bad..)
if(nb == NULL){
ShowWarning("Netbuffer: get(%u): => no appropriate pool found - emergency allocation required.\n", sz);
ShowWarning("Please reconfigure your network.conf!");
InterlockedIncrement(&l_nEmergencyAllocations);
// .. better to check (netbuf struct provides 32 byte bufferspace itself.
if(sz < 32) sz = 32;
// allocate memory using malloc ..
while(1){
nb = (netbuf) aMalloc( (sizeof(struct netbuf) + sz - 32) );
if(nb != NULL){
memset(nb, 0x00, (sizeof(struct netbuf) + sz - 32) ); // zero memory! (to enforce commit @ os.)
nb->pool = -1; // emergency alloc.
break;
}
rathread_yield();
}// spin allocation.
}
nb->refcnt = 1; // Initial refcount is 1
return nb;
}//end: netbuffer_get()
void netbuffer_put( netbuf nb ){
// Decrement reference counter, if > 0 do nothing :)
if( InterlockedDecrement(&nb->refcnt) > 0 )
return;
// Is this buffer an emergency allocated buffer?
if(nb->pool == -1){
aFree(nb);
return;
}
// Otherwise its a normal mempool based buffer
// return it to the according mempool:
mempool_node_put( l_pool[nb->pool], nb);
}//end: netbuffer_put()
void netbuffer_incref( netbuf nb ){
InterlockedIncrement(&nb->refcnt);
}//end: netbuf_incref()
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