From 1af788a8fb37bd5695b572bb3506409949c06485 Mon Sep 17 00:00:00 2001 From: Hirokazu Honda Date: Thu, 10 Jun 2021 16:50:26 +0900 Subject: libcamera: pipeline: raspberrypi: DmaHeaps: Use UniqueFD for a file descriptor Manages a file descriptor owned by DmaHeaps for a dma handle by UniqueFD. Furthermore, DmaHeaps::alloc() creates a new file descriptor and the returned file descriptor is owned by a caller. This also clarifies it by changing the returned value to UniqueFD. Signed-off-by: Hirokazu Honda Signed-off-by: Laurent Pinchart Reviewed-by: Hirokazu Honda Reviewed-by: Jacopo Mondi --- src/libcamera/pipeline/raspberrypi/dma_heaps.cpp | 28 ++++++++++-------------- 1 file changed, 11 insertions(+), 17 deletions(-) (limited to 'src/libcamera/pipeline/raspberrypi/dma_heaps.cpp') diff --git a/src/libcamera/pipeline/raspberrypi/dma_heaps.cpp b/src/libcamera/pipeline/raspberrypi/dma_heaps.cpp index 573ea11d..69831dab 100644 --- a/src/libcamera/pipeline/raspberrypi/dma_heaps.cpp +++ b/src/libcamera/pipeline/raspberrypi/dma_heaps.cpp @@ -35,7 +35,6 @@ LOG_DECLARE_CATEGORY(RPI) namespace RPi { DmaHeap::DmaHeap() - : dmaHeapHandle_(-1) { for (const char *name : heapNames) { int ret = ::open(name, O_RDWR, 0); @@ -46,49 +45,44 @@ DmaHeap::DmaHeap() continue; } - dmaHeapHandle_ = ret; + dmaHeapHandle_ = UniqueFD(ret); break; } - if (dmaHeapHandle_ < 0) + if (!dmaHeapHandle_.isValid()) LOG(RPI, Error) << "Could not open any dmaHeap device"; } -DmaHeap::~DmaHeap() -{ - if (dmaHeapHandle_ > -1) - ::close(dmaHeapHandle_); -} +DmaHeap::~DmaHeap() = default; -FileDescriptor DmaHeap::alloc(const char *name, std::size_t size) +UniqueFD DmaHeap::alloc(const char *name, std::size_t size) { int ret; if (!name) - return FileDescriptor(); + return {}; struct dma_heap_allocation_data alloc = {}; alloc.len = size; alloc.fd_flags = O_CLOEXEC | O_RDWR; - ret = ::ioctl(dmaHeapHandle_, DMA_HEAP_IOCTL_ALLOC, &alloc); - + ret = ::ioctl(dmaHeapHandle_.get(), DMA_HEAP_IOCTL_ALLOC, &alloc); if (ret < 0) { LOG(RPI, Error) << "dmaHeap allocation failure for " << name; - return FileDescriptor(); + return {}; } - ret = ::ioctl(alloc.fd, DMA_BUF_SET_NAME, name); + UniqueFD allocFd(alloc.fd); + ret = ::ioctl(allocFd.get(), DMA_BUF_SET_NAME, name); if (ret < 0) { LOG(RPI, Error) << "dmaHeap naming failure for " << name; - ::close(alloc.fd); - return FileDescriptor(); + return {}; } - return FileDescriptor(std::move(alloc.fd)); + return allocFd; } } /* namespace RPi */ -- cgit v1.2.1