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author | The Android Open Source Project <initial-contribution@android.com> | 2009-03-03 18:29:04 -0800 |
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committer | The Android Open Source Project <initial-contribution@android.com> | 2009-03-03 18:29:04 -0800 |
commit | e54eebbf1a908d65ee8cf80bab62821c05666d70 (patch) | |
tree | 4b825dc642cb6eb9a060e54bf8d69288fbee4904 /libpixelflinger/tinyutils/SharedBuffer.cpp | |
parent | a1e1c1b106423de09bc918502e7a51d4ffe5a4ae (diff) | |
download | system_core-e54eebbf1a908d65ee8cf80bab62821c05666d70.zip system_core-e54eebbf1a908d65ee8cf80bab62821c05666d70.tar.gz system_core-e54eebbf1a908d65ee8cf80bab62821c05666d70.tar.bz2 |
auto import from //depot/cupcake/@135843
Diffstat (limited to 'libpixelflinger/tinyutils/SharedBuffer.cpp')
-rw-r--r-- | libpixelflinger/tinyutils/SharedBuffer.cpp | 106 |
1 files changed, 0 insertions, 106 deletions
diff --git a/libpixelflinger/tinyutils/SharedBuffer.cpp b/libpixelflinger/tinyutils/SharedBuffer.cpp deleted file mode 100644 index ef781a7..0000000 --- a/libpixelflinger/tinyutils/SharedBuffer.cpp +++ /dev/null @@ -1,106 +0,0 @@ -/* - * SharedBuffer.cpp - * Android - * - * Copyright 2005 The Android Open Source Project - * - */ - -#include <stdlib.h> -#include <string.h> - -#include <cutils/atomic.h> - -#include "tinyutils/SharedBuffer.h" - -// --------------------------------------------------------------------------- - -namespace android { - -SharedBuffer* SharedBuffer::alloc(size_t size) -{ - SharedBuffer* sb = static_cast<SharedBuffer *>(malloc(sizeof(SharedBuffer) + size)); - if (sb) { - sb->mRefs = 1; - sb->mSize = size; - } - return sb; -} - - -ssize_t SharedBuffer::dealloc(const SharedBuffer* released) -{ - if (released->mRefs != 0) return -1; // XXX: invalid operation - free(const_cast<SharedBuffer*>(released)); - return 0; -} - -SharedBuffer* SharedBuffer::edit() const -{ - if (onlyOwner()) { - return const_cast<SharedBuffer*>(this); - } - SharedBuffer* sb = alloc(mSize); - if (sb) { - memcpy(sb->data(), data(), size()); - release(); - } - return sb; -} - -SharedBuffer* SharedBuffer::editResize(size_t newSize) const -{ - if (onlyOwner()) { - SharedBuffer* buf = const_cast<SharedBuffer*>(this); - if (buf->mSize == newSize) return buf; - buf = (SharedBuffer*)realloc(buf, sizeof(SharedBuffer) + newSize); - if (buf != NULL) { - buf->mSize = newSize; - return buf; - } - } - SharedBuffer* sb = alloc(newSize); - if (sb) { - const size_t mySize = mSize; - memcpy(sb->data(), data(), newSize < mySize ? newSize : mySize); - release(); - } - return sb; -} - -SharedBuffer* SharedBuffer::attemptEdit() const -{ - if (onlyOwner()) { - return const_cast<SharedBuffer*>(this); - } - return 0; -} - -SharedBuffer* SharedBuffer::reset(size_t new_size) const -{ - // cheap-o-reset. - SharedBuffer* sb = alloc(new_size); - if (sb) { - release(); - } - return sb; -} - -void SharedBuffer::acquire() const { - android_atomic_inc(&mRefs); -} - -int32_t SharedBuffer::release(uint32_t flags) const -{ - int32_t prev = 1; - if (onlyOwner() || ((prev = android_atomic_dec(&mRefs)) == 1)) { - mRefs = 0; - if ((flags & eKeepStorage) == 0) { - free(const_cast<SharedBuffer*>(this)); - } - } - return prev; -} - - -}; // namespace android |