andreacavalli/netty5
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Pass struct's per pointer to eliminate memory copy.

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Motivation:

Before struct's were passed per value and not pointer. This did enforce a memory copy which is not needed.

Modifications:

- Use "const struct....*" as replacement

Result:

No more unnecessary memory copies
This commit is contained in:
Norman Maurer 2015-02-25 08:56:28 +01:00
parent 01bc2d6d80
commit 6c24dd4d8f
1 changed files with 23 additions and 23 deletions
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46
transport-native-epoll/src/main/c/io_netty_channel_epoll_Native.c
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@ -145,17 +145,17 @@ static inline int setOption(JNIEnv* env, jint fd, int level, int optname, const
return rc;
}
jobject createInetSocketAddress(JNIEnv* env, struct sockaddr_storage addr) {
jobject createInetSocketAddress(JNIEnv* env, const struct sockaddr_storage* addr) {
char ipstr[INET6_ADDRSTRLEN];
int port;
jstring ipString;
if (addr.ss_family == AF_INET) {
struct sockaddr_in* s = (struct sockaddr_in*) &addr;
if (addr->ss_family == AF_INET) {
struct sockaddr_in* s = (struct sockaddr_in*) addr;
port = ntohs(s->sin_port);
inet_ntop(AF_INET, &s->sin_addr, ipstr, sizeof ipstr);
ipString = (*env)->NewStringUTF(env, ipstr);
} else {
struct sockaddr_in6* s = (struct sockaddr_in6*) &addr;
struct sockaddr_in6* s = (struct sockaddr_in6*) addr;
port = ntohs(s->sin6_port);
inet_ntop(AF_INET6, &s->sin6_addr, ipstr, sizeof ipstr);
if (strncasecmp(ipstr, ip4prefix, 7) == 0) {
@ -174,11 +174,11 @@ jobject createInetSocketAddress(JNIEnv* env, struct sockaddr_storage addr) {
}
static inline int addressLength(struct sockaddr_storage addr) {
if (addr.ss_family == AF_INET) {
static inline int addressLength(const struct sockaddr_storage* addr) {
if (addr->ss_family == AF_INET) {
return 8;
} else {
struct sockaddr_in6* s = (struct sockaddr_in6*) &addr;
struct sockaddr_in6* s = (struct sockaddr_in6*) addr;
if (s->sin6_addr.s6_addr[0] == 0x00 && s->sin6_addr.s6_addr[1] == 0x00 && s->sin6_addr.s6_addr[2] == 0x00 && s->sin6_addr.s6_addr[3] == 0x00 && s->sin6_addr.s6_addr[4] == 0x00
&& s->sin6_addr.s6_addr[5] == 0x00 && s->sin6_addr.s6_addr[6] == 0x00 && s->sin6_addr.s6_addr[7] == 0x00 && s->sin6_addr.s6_addr[8] == 0x00 && s->sin6_addr.s6_addr[9] == 0x00
&& s->sin6_addr.s6_addr[10] == 0xff && s->sin6_addr.s6_addr[11] == 0xff) {
@ -190,10 +190,10 @@ static inline int addressLength(struct sockaddr_storage addr) {
}
}
static inline void initInetSocketAddressArray(JNIEnv* env, struct sockaddr_storage addr, jbyteArray bArray, int offset, int len) {
static inline void initInetSocketAddressArray(JNIEnv* env, const struct sockaddr_storage* addr, jbyteArray bArray, int offset, int len) {
int port;
if (addr.ss_family == AF_INET) {
struct sockaddr_in* s = (struct sockaddr_in*) &addr;
if (addr->ss_family == AF_INET) {
struct sockaddr_in* s = (struct sockaddr_in*) addr;
port = ntohs(s->sin_port);
// Encode address and port into the array
@ -205,7 +205,7 @@ static inline void initInetSocketAddressArray(JNIEnv* env, struct sockaddr_stora
(*env)->SetByteArrayRegion(env, bArray, offset, 4, (jbyte*) &s->sin_addr.s_addr);
(*env)->SetByteArrayRegion(env, bArray, offset + 4, 4, (jbyte*) &a);
} else {
struct sockaddr_in6* s = (struct sockaddr_in6*) &addr;
struct sockaddr_in6* s = (struct sockaddr_in6*) addr;
port = ntohs(s->sin6_port);
if (len == 8) {
@ -238,7 +238,7 @@ static inline void initInetSocketAddressArray(JNIEnv* env, struct sockaddr_stora
}
}
static jbyteArray createInetSocketAddressArray(JNIEnv* env, struct sockaddr_storage addr) {
static jbyteArray createInetSocketAddressArray(JNIEnv* env, const struct sockaddr_storage* addr) {
int len = addressLength(addr);
jbyteArray bArray = (*env)->NewByteArray(env, len);
@ -246,17 +246,17 @@ static jbyteArray createInetSocketAddressArray(JNIEnv* env, struct sockaddr_stor
return bArray;
}
static jobject createDatagramSocketAddress(JNIEnv* env, struct sockaddr_storage addr, int len) {
static jobject createDatagramSocketAddress(JNIEnv* env, const struct sockaddr_storage* addr, int len) {
char ipstr[INET6_ADDRSTRLEN];
int port;
jstring ipString;
if (addr.ss_family == AF_INET) {
struct sockaddr_in* s = (struct sockaddr_in*) &addr;
if (addr->ss_family == AF_INET) {
struct sockaddr_in* s = (struct sockaddr_in*) addr;
port = ntohs(s->sin_port);
inet_ntop(AF_INET, &s->sin_addr, ipstr, sizeof ipstr);
ipString = (*env)->NewStringUTF(env, ipstr);
} else {
struct sockaddr_in6* s = (struct sockaddr_in6*) &addr;
struct sockaddr_in6* s = (struct sockaddr_in6*) addr;
port = ntohs(s->sin6_port);
inet_ntop(AF_INET6, &s->sin6_addr, ipstr, sizeof ipstr);
@ -275,7 +275,7 @@ static jobject createDatagramSocketAddress(JNIEnv* env, struct sockaddr_storage
return socketAddr;
}
static int init_sockaddr(JNIEnv* env, jbyteArray address, jint scopeId, jint jport, struct sockaddr_storage* addr) {
static int init_sockaddr(JNIEnv* env, jbyteArray address, jint scopeId, jint jport, const struct sockaddr_storage* addr) {
uint16_t port = htons((uint16_t) jport);
// Use GetPrimitiveArrayCritical and ReleasePrimitiveArrayCritical to signal the VM that we really would like
// to not do a memory copy here. This is ok as we not do any blocking action here anyway.
@ -705,7 +705,7 @@ JNIEXPORT jint JNICALL Java_io_netty_channel_epoll_Native_writeAddress0(JNIEnv*
return _write(env, clazz, fd, (void*) address, pos, limit);
}
static inline jint _sendTo(JNIEnv* env, jint fd, void* buffer, jint pos, jint limit ,jbyteArray address, jint scopeId, jint port) {
static inline jint _sendTo(JNIEnv* env, jint fd, void* buffer, jint pos, jint limit, jbyteArray address, jint scopeId, jint port) {
struct sockaddr_storage addr;
if (init_sockaddr(env, address, scopeId, port, &addr) == -1) {
return -1;
@ -825,7 +825,7 @@ static inline jobject recvFrom0(JNIEnv* env, jint fd, void* buffer, jint pos, ji
return NULL;
}
return createDatagramSocketAddress(env, addr, res);
return createDatagramSocketAddress(env, &addr, res);
}
JNIEXPORT jobject JNICALL Java_io_netty_channel_epoll_Native_recvFrom(JNIEnv* env, jclass clazz, jint fd, jobject jbuffer, jint pos, jint limit) {
@ -1048,11 +1048,11 @@ JNIEXPORT jint JNICALL Java_io_netty_channel_epoll_Native_accept0(JNIEnv* env, j
return -err;
}
int len = addressLength(addr);
int len = addressLength(&addr);
// Fill in remote address details
(*env)->SetByteArrayRegion(env, acceptedAddress, 0, 4, (jbyte*) &len);
initInetSocketAddressArray(env, addr, acceptedAddress, 1, len);
initInetSocketAddressArray(env, &addr, acceptedAddress, 1, len);
if (accept4) {
return socketFd;
@ -1109,7 +1109,7 @@ JNIEXPORT jbyteArray JNICALL Java_io_netty_channel_epoll_Native_remoteAddress0(J
if (getpeername(fd, (struct sockaddr*) &addr, &len) == -1) {
return NULL;
}
return createInetSocketAddressArray(env, addr);
return createInetSocketAddressArray(env, &addr);
}
JNIEXPORT jbyteArray JNICALL Java_io_netty_channel_epoll_Native_localAddress0(JNIEnv* env, jclass clazz, jint fd) {
@ -1120,7 +1120,7 @@ JNIEXPORT jbyteArray JNICALL Java_io_netty_channel_epoll_Native_localAddress0(JN
if (getsockname(fd, (struct sockaddr*) &addr, &len) == -1) {
return NULL;
}
return createInetSocketAddressArray(env, addr);
return createInetSocketAddressArray(env, &addr);
}
JNIEXPORT void JNICALL Java_io_netty_channel_epoll_Native_setReuseAddress(JNIEnv* env, jclass clazz, jint fd, jint optval) {