C++ (Cpp) throw_ioe Examples

Example #1

File: NativeIO.c Project: jebarba/hadoop

/*
 * public static native FileDescriptor open(String path, int flags, int mode);
 */
JNIEXPORT jobject JNICALL
Java_org_apache_hadoop_io_nativeio_NativeIO_open(
  JNIEnv *env, jclass clazz, jstring j_path,
  jint flags, jint mode)
{
  jobject ret = NULL;

  const char *path = (*env)->GetStringUTFChars(env, j_path, NULL);
  if (path == NULL) goto cleanup; // JVM throws Exception for us

  int fd;  
  if (flags & O_CREAT) {
    fd = open(path, flags, mode);
  } else {
    fd = open(path, flags);
  }

  if (fd == -1) {
    throw_ioe(env, errno);
    goto cleanup;
  }

  ret = fd_create(env, fd);

cleanup:
  if (path != NULL) {
    (*env)->ReleaseStringUTFChars(env, j_path, path);
  }
  return ret;
}

Example #2

File: NativeIO.c Project: jebarba/hadoop

/**
 * public static native void chmod(String path, int mode) throws IOException;
 */
JNIEXPORT void JNICALL
Java_org_apache_hadoop_io_nativeio_NativeIO_chmod(
  JNIEnv *env, jclass clazz, jstring j_path,
  jint mode)
{
  const char *path = (*env)->GetStringUTFChars(env, j_path, NULL);
  if (path == NULL) return; // JVM throws Exception for us

  if (chmod(path, mode) != 0) {
    throw_ioe(env, errno);
  }

  (*env)->ReleaseStringUTFChars(env, j_path, path);
}

Example #3

File: NativeIO.c Project: 55171514/hadoop-20

/*
 * public static native Stat fstat(FileDescriptor fd);
 */
JNIEXPORT jobject JNICALL
Java_org_apache_hadoop_io_nativeio_NativeIO_fstat(
  JNIEnv *env, jclass clazz, jobject fd_object)
{
  jobject ret = NULL;

  int fd = fd_get(env, fd_object);

  struct stat s;
  int rc = fstat(fd, &s);
  if (rc != 0) {
    throw_ioe(env, errno);
    return ret;
  }
  return process_stat(env, s);
}

Example #4

File: NativeIO.c Project: 55171514/hadoop-20

/*
 * Processes the result of stat() and creates the Java level
 * NativeIO$Stat object
 */
static jobject process_stat(JNIEnv *env, struct stat s) {

  jobject ret = NULL;
  char *pw_buf = NULL;
  int pw_lock_locked = 0;

  size_t pw_buflen = get_pw_buflen();
  if ((pw_buf = malloc(pw_buflen)) == NULL) {
    THROW(env, "java/lang/OutOfMemoryError", "Couldn't allocate memory for pw buffer");
    goto cleanup;
  }

  if (pw_lock_object != NULL) {
    if ((*env)->MonitorEnter(env, pw_lock_object) != JNI_OK) {
      goto cleanup;
    }
    pw_lock_locked = 1;
  }

  // Grab username
  struct passwd pwd, *pwdp;
  int rc;
  while ((rc = getpwuid_r(s.st_uid, &pwd, pw_buf, pw_buflen, &pwdp)) != 0) {
    if (rc != ERANGE) {
      throw_ioe(env, rc);
      goto cleanup;
    }
    free(pw_buf);
    pw_buflen *= 2;
    if ((pw_buf = malloc(pw_buflen)) == NULL) {
      THROW(env, "java/lang/OutOfMemoryError", "Couldn't allocate memory for pw buffer");
      goto cleanup;
    }
  }
  assert(pwdp == &pwd);

  jstring jstr_username = (*env)->NewStringUTF(env, pwd.pw_name);
  if (jstr_username == NULL) goto cleanup;

  // Grab group
  struct group grp, *grpp;
  while ((rc = getgrgid_r(s.st_gid, &grp, pw_buf, pw_buflen, &grpp)) != 0) {
    if (rc != ERANGE) {
      throw_ioe(env, rc);
      goto cleanup;
    }
    free(pw_buf);
    pw_buflen *= 2;
    if ((pw_buf = malloc(pw_buflen)) == NULL) {
      THROW(env, "java/lang/OutOfMemoryError", "Couldn't allocate memory for pw buffer");
      goto cleanup;
    }
  }
  assert(grpp == &grp);

  jstring jstr_groupname = (*env)->NewStringUTF(env, grp.gr_name);
  PASS_EXCEPTIONS_GOTO(env, cleanup);

  // Construct result
  ret = (*env)->NewObject(env, stat_clazz, stat_ctor,
    jstr_username, jstr_groupname, s.st_mode, s.st_nlink, s.st_ino);

cleanup:
  if (pw_buf != NULL) free(pw_buf);
  if (pw_lock_locked) {
    (*env)->MonitorExit(env, pw_lock_object);
  }
  return ret;
}

Example #5

File: NativeIO.c Project: jebarba/hadoop

/*
 * public static native Stat fstat(FileDescriptor fd);
 */
JNIEXPORT jobject JNICALL
Java_org_apache_hadoop_io_nativeio_NativeIO_fstat(
  JNIEnv *env, jclass clazz, jobject fd_object)
{
  jobject ret = NULL;
  char *pw_buf = NULL;

  int fd = fd_get(env, fd_object);
  PASS_EXCEPTIONS_GOTO(env, cleanup);

  struct stat s;
  int rc = fstat(fd, &s);
  if (rc != 0) {
    throw_ioe(env, errno);
    goto cleanup;
  }

  size_t pw_buflen = get_pw_buflen();
  if ((pw_buf = malloc(pw_buflen)) == NULL) {
    THROW(env, "java/lang/OutOfMemoryError", "Couldn't allocate memory for pw buffer");
    goto cleanup;
  }

  // Grab username
  struct passwd pwd, *pwdp;
  while ((rc = getpwuid_r(s.st_uid, &pwd, pw_buf, pw_buflen, &pwdp)) != 0) {
    if (rc != ERANGE) {
      throw_ioe(env, rc);
      goto cleanup;
    }
    free(pw_buf);
    pw_buflen *= 2;
    if ((pw_buf = malloc(pw_buflen)) == NULL) {
      THROW(env, "java/lang/OutOfMemoryError", "Couldn't allocate memory for pw buffer");
      goto cleanup;
    }
  }
  assert(pwdp == &pwd);

  jstring jstr_username = (*env)->NewStringUTF(env, pwd.pw_name);
  if (jstr_username == NULL) goto cleanup;

  // Grab group
  struct group grp, *grpp;
  while ((rc = getgrgid_r(s.st_gid, &grp, pw_buf, pw_buflen, &grpp)) != 0) {
    if (rc != ERANGE) {
      throw_ioe(env, rc);
      goto cleanup;
    }
    free(pw_buf);
    pw_buflen *= 2;
    if ((pw_buf = malloc(pw_buflen)) == NULL) {
      THROW(env, "java/lang/OutOfMemoryError", "Couldn't allocate memory for pw buffer");
      goto cleanup;
    }
  }
  assert(grpp == &grp);

  jstring jstr_groupname = (*env)->NewStringUTF(env, grp.gr_name);
  PASS_EXCEPTIONS_GOTO(env, cleanup);

  // Construct result
  ret = (*env)->NewObject(env, stat_clazz, stat_ctor,
    jstr_username, jstr_groupname, s.st_mode);

cleanup:
  if (pw_buf != NULL) free(pw_buf);
  return ret;
}