move native_handle stuff from master_gl (8f13782e) · Commits · e / os / android_system_core

include/cutils/native_handle.h

+45 −2

Original line number	Diff line number	Diff line
		@@ -17,12 +17,55 @@
		#ifndef NATIVE_HANDLE_H_
		#define NATIVE_HANDLE_H_

		#include <sys/cdefs.h>

		__BEGIN_DECLS

		typedef struct
		{
		int version; /* sizeof(native_handle) */
		int version; /* sizeof(native_handle_t) */
		int numFds; /* number of file-descriptors at &data[0] */
		int numInts; /* number of ints at &data[numFds] */
		int data[0]; /* numFds + numInts ints */
		} native_handle;
		} native_handle_t;


		/* keep the old definition for backward source-compatibility */
		typedef native_handle_t native_handle;

		/*
		* native_handle_close
		*
		* closes the file descriptors contained in this native_handle_t
		*
		* return 0 on success, or a negative error code on failure
		*
		*/
		int native_handle_close(const native_handle_t* h);


		/*
		* native_handle_create
		*
		* creates a native_handle_t and initializes it. must be destroyed with
		* native_handle_delete().
		*
		*/
		native_handle_t* native_handle_create(int numFds, int numInts);

		/*
		* native_handle_delete
		*
		* frees a native_handle_t allocated with native_handle_create().
		* This ONLY frees the memory allocated for the native_handle_t, but doesn't
		* close the file descriptors; which can be achieved with native_handle_close().
		*
		* return 0 on success, or a negative error code on failure
		*
		*/
		int native_handle_delete(native_handle_t* h);


		__END_DECLS

		#endif /* NATIVE_HANDLE_H_ */

+1 −0

0 → 100644

+60 −0

Original line number	Diff line number	Diff line
		/*
		* Copyright (C) 2007 The Android Open Source Project
		*
		* Licensed under the Apache License, Version 2.0 (the "License");
		* you may not use this file except in compliance with the License.
		* You may obtain a copy of the License at
		*
		* http://www.apache.org/licenses/LICENSE-2.0
		*
		* Unless required by applicable law or agreed to in writing, software
		* distributed under the License is distributed on an "AS IS" BASIS,
		* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
		* See the License for the specific language governing permissions and
		* limitations under the License.
		*/

		#define LOG_TAG "NativeHandle"

		#include <stdint.h>
		#include <errno.h>
		#include <string.h>
		#include <stdlib.h>
		#include <unistd.h>

		#include <cutils/log.h>
		#include <cutils/native_handle.h>

		native_handle_t* native_handle_create(int numFds, int numInts)
		{
		native_handle_t* h = malloc(
		sizeof(native_handle_t) + sizeof(int)*(numFds+numInts));

		h->version = sizeof(native_handle_t);
		h->numFds = numFds;
		h->numInts = numInts;
		return h;
		}

		int native_handle_delete(native_handle_t* h)
		{
		if (h) {
		if (h->version != sizeof(native_handle_t))
		return -EINVAL;
		free(h);
		}
		return 0;
		}

		int native_handle_close(const native_handle_t* h)
		{
		if (h->version != sizeof(native_handle_t))
		return -EINVAL;

		const int numFds = h->numFds;
		int i;
		for (i=0 ; i<numFds ; i++) {
		close(h->data[i]);
		}
		return 0;
		}