checkpoint: split libutils into libutils + libbinder
diff --git a/MemoryHeapBase.cpp b/MemoryHeapBase.cpp
new file mode 100644
index 0000000..8251728
--- /dev/null
+++ b/MemoryHeapBase.cpp
@@ -0,0 +1,183 @@
+/*
+ * Copyright (C) 2008 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 "MemoryHeapBase"
+
+#include <stdlib.h>
+#include <stdint.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/ioctl.h>
+
+#include <cutils/log.h>
+#include <cutils/ashmem.h>
+#include <cutils/atomic.h>
+
+#include <utils/MemoryHeapBase.h>
+
+#if HAVE_ANDROID_OS
+#include <linux/android_pmem.h>
+#endif
+
+
+namespace android {
+
+// ---------------------------------------------------------------------------
+
+MemoryHeapBase::MemoryHeapBase()
+ : mFD(-1), mSize(0), mBase(MAP_FAILED),
+ mDevice(NULL), mNeedUnmap(false)
+{
+}
+
+MemoryHeapBase::MemoryHeapBase(size_t size, uint32_t flags, char const * name)
+ : mFD(-1), mSize(0), mBase(MAP_FAILED), mFlags(flags),
+ mDevice(0), mNeedUnmap(false)
+{
+ const size_t pagesize = getpagesize();
+ size = ((size + pagesize-1) & ~(pagesize-1));
+ int fd = ashmem_create_region(name == NULL ? "MemoryHeapBase" : name, size);
+ LOGE_IF(fd<0, "error creating ashmem region: %s", strerror(errno));
+ if (fd >= 0) {
+ if (mapfd(fd, size) == NO_ERROR) {
+ if (flags & READ_ONLY) {
+ ashmem_set_prot_region(fd, PROT_READ);
+ }
+ }
+ }
+}
+
+MemoryHeapBase::MemoryHeapBase(const char* device, size_t size, uint32_t flags)
+ : mFD(-1), mSize(0), mBase(MAP_FAILED), mFlags(flags),
+ mDevice(0), mNeedUnmap(false)
+{
+ int fd = open(device, O_RDWR);
+ LOGE_IF(fd<0, "error opening %s: %s", device, strerror(errno));
+ if (fd >= 0) {
+ const size_t pagesize = getpagesize();
+ size = ((size + pagesize-1) & ~(pagesize-1));
+ if (mapfd(fd, size) == NO_ERROR) {
+ mDevice = device;
+ }
+ }
+}
+
+MemoryHeapBase::MemoryHeapBase(int fd, size_t size, uint32_t flags)
+ : mFD(-1), mSize(0), mBase(MAP_FAILED), mFlags(flags),
+ mDevice(0), mNeedUnmap(false)
+{
+ const size_t pagesize = getpagesize();
+ size = ((size + pagesize-1) & ~(pagesize-1));
+ mapfd(dup(fd), size);
+}
+
+status_t MemoryHeapBase::init(int fd, void *base, int size, int flags, const char* device)
+{
+ if (mFD != -1) {
+ return INVALID_OPERATION;
+ }
+ mFD = fd;
+ mBase = base;
+ mSize = size;
+ mFlags = flags;
+ mDevice = device;
+ return NO_ERROR;
+}
+
+status_t MemoryHeapBase::mapfd(int fd, size_t size)
+{
+ if (size == 0) {
+ // try to figure out the size automatically
+#if HAVE_ANDROID_OS
+ // first try the PMEM ioctl
+ pmem_region reg;
+ int err = ioctl(fd, PMEM_GET_TOTAL_SIZE, ®);
+ if (err == 0)
+ size = reg.len;
+#endif
+ if (size == 0) { // try fstat
+ struct stat sb;
+ if (fstat(fd, &sb) == 0)
+ size = sb.st_size;
+ }
+ // if it didn't work, let mmap() fail.
+ }
+
+ if ((mFlags & DONT_MAP_LOCALLY) == 0) {
+ void* base = (uint8_t*)mmap(0, size,
+ PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0);
+ if (base == MAP_FAILED) {
+ LOGE("mmap(fd=%d, size=%u) failed (%s)",
+ fd, uint32_t(size), strerror(errno));
+ close(fd);
+ return -errno;
+ }
+ //LOGD("mmap(fd=%d, base=%p, size=%lu)", fd, base, size);
+ mBase = base;
+ mNeedUnmap = true;
+ } else {
+ mBase = 0; // not MAP_FAILED
+ mNeedUnmap = false;
+ }
+ mFD = fd;
+ mSize = size;
+ return NO_ERROR;
+}
+
+MemoryHeapBase::~MemoryHeapBase()
+{
+ dispose();
+}
+
+void MemoryHeapBase::dispose()
+{
+ int fd = android_atomic_or(-1, &mFD);
+ if (fd >= 0) {
+ if (mNeedUnmap) {
+ //LOGD("munmap(fd=%d, base=%p, size=%lu)", fd, mBase, mSize);
+ munmap(mBase, mSize);
+ }
+ mBase = 0;
+ mSize = 0;
+ close(fd);
+ }
+}
+
+int MemoryHeapBase::getHeapID() const {
+ return mFD;
+}
+
+void* MemoryHeapBase::getBase() const {
+ return mBase;
+}
+
+size_t MemoryHeapBase::getSize() const {
+ return mSize;
+}
+
+uint32_t MemoryHeapBase::getFlags() const {
+ return mFlags;
+}
+
+const char* MemoryHeapBase::getDevice() const {
+ return mDevice;
+}
+
+// ---------------------------------------------------------------------------
+}; // namespace android