/**
* Write multiple bytes to file or socket.
*
* @param file or socket descriptor
* @param buffer to be written
* @param number of bytes to write
* @return number of bytes written (-2: error, -1: socket would have blocked, -3 EPIPE error)
*/
EXTERNAL int sysWriteBytes(int fd, char *buf, int cnt)
{
SYS_START();
TRACE_PRINTF("%s: sysWriteBytes %d %p %d\n", Me, fd, buf, cnt);
#ifdef RVM_FOR_HARMONY
return hyfile_write(fd, buf, cnt);
#else
while(1) {
int rc = write(fd, buf, cnt);
if (rc >= 0)
return rc;
int err = errno;
if (err == EAGAIN) {
TRACE_PRINTF("%s: write on %d would have blocked: needs retry\n", Me, fd);
return -1;
} else if (err == EINTR) {
// interrupted by signal; try again
} else if (err == EPIPE) {
TRACE_PRINTF("%s: write on %d with nobody to read it\n", Me, fd);
return -3;
} else {
ERROR_PRINTF("%s: write error %d (%s) on %d\n", Me,
err, strerror( err ), fd);
return -2;
}
}
#endif // RVM_FOR_HARMONY
}
/*
* Class: org_apache_harmony_luni_platform_OSFileSystem
* Method: writeDirectImpl
* Signature: (JJI)J
*/
JNIEXPORT jlong JNICALL Java_org_apache_harmony_luni_platform_OSFileSystem_writeDirectImpl
(JNIEnv * env, jobject thiz, jlong fd, jlong buf, jint offset, jint nbytes)
{
PORT_ACCESS_FROM_ENV (env);
return (jlong) hyfile_write ((IDATA) fd,
(const void *) ((IDATA)(buf+offset)),
(IDATA) nbytes);
}
/*
* Class: org_apache_harmony_luni_platform_OSFileSystem
* Method: writeImpl
* Signature: (J[BII)J
*/
JNIEXPORT jlong JNICALL Java_org_apache_harmony_luni_platform_OSFileSystem_writeImpl
(JNIEnv * env, jobject thiz, jlong fd, jbyteArray byteArray, jint offset, jint nbytes)
{
PORT_ACCESS_FROM_ENV (env);
jboolean isCopy;
jbyte *bytes = (*env)->GetByteArrayElements (env, byteArray, &isCopy);
jlong result;
result =
(jlong) hyfile_write ((IDATA) fd, (void *) (bytes + offset),
(IDATA) nbytes);
if(result == -1 && hyerror_last_error_number() == HYPORT_ERROR_FILE_LOCKED){
throwNewExceptionByName(env, "java/io/IOException", netLookupErrorString(env, HYPORT_ERROR_FILE_LOCKED));
}
(*env)->ReleaseByteArrayElements (env, byteArray, bytes, JNI_ABORT);
return result;
}
/**
* Write one byte to file.
*
* @param fd file descriptor
* @param data data to write
* @return -2 operation would block, -1: error, 0: success
*/
EXTERNAL int sysWriteByte(int fd, int data)
{
SYS_START();
char ch = data;
TRACE_PRINTF("%s: sysWriteByte %d %c\n", Me, fd, ch);
#ifdef RVM_FOR_HARMONY
return hyfile_write(fd, &ch, 1);
#else
while(1) {
int rc = write(fd, &ch, 1);
if (rc == 1) {
return 0; // success
} else if (errno == EAGAIN) {
return -2; // operation would block
} else if (errno == EINTR) {
} else {
ERROR_PRINTF("%s: writeByte, fd=%d, write returned error %d (%s)\n", Me,
fd, errno, strerror(errno));
return -1; // some kind of error
}
}
#endif // RVM_FOR_HARMONY
}
