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authorLaurent Pinchart <laurent.pinchart@ideasonboard.com>2022-04-27 00:50:30 +0300
committerLaurent Pinchart <laurent.pinchart@ideasonboard.com>2022-05-04 14:11:23 +0300
commit4f1d1a48fe7ebe1282d7608a59cb059e1367e584 (patch)
treecbe262ec49428944406c34c2f3313ca1816a0404 /src/qcam/assets/feathericons
parentdc7fc90573b99bbc6d21a25a741891471d68f274 (diff)
libcamera: object: Silence gcc false positive error in release mode
gcc 10 and 11 produce an error when compiling libcamera in release mode: In file included from ../../src/libcamera/base/object.cpp:13: ../../include/libcamera/base/message.h: In member function ‘void libcamera::Object::notifyThreadMove()’: ../../include/libcamera/base/message.h:58:47: error: array subscript ‘const libcamera::InvokeMessage[0]’ is partly outside array bounds of ‘libcamera::Message [1]’ [-Werror=array-bounds] 58 | Semaphore *semaphore() const { return semaphore_; } | ^~~~~~~~~~ ../../src/libcamera/base/object.cpp:280:17: note: while referencing ‘msg’ 280 | Message msg(Message::ThreadMoveMessage); | ^~~ This seems to be a false positive, given that msg->type() can never be equal to Message::InvokeMessage in Object::message() when called from Object::notifyThreadMove(), as the message is created there with the Message::ThreadMoveMessage type. The problem as been reported in https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105400, but the error nonetheless needs to be fixed without waiting for a new gcc release, and a dynamic_cast does the job with a small additional runtime cost that shouldn't be a big issue, given that moving objects between threads is a rare operation. Bug: https://bugs.libcamera.org/show_bug.cgi?id=125 Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
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