A Multithreaded, Transaction-Based Locking Strategy for Containers Bob Steagall CppCon 2020 K E W B C O M P U T I N GCopyright © 2020 Bob Steagall K E W B C O M P U T I N G Overview • Sharing a container STO-based solution • Summary CppCon 2020 - A Multi-threaded, Transaction-Based Locking Strategy for Containers 2Copyright © 2020 Bob Steagall K E W B C O M P U T I N G Sharing a Container • Sometimes a container is easier (?) than ever CppCon 2020 - A Multi-threaded, Transaction-Based Locking Strategy for Containers 3Copyright © 2020 Bob Steagall K E W B C O M P U T I N G Sharing a Container – Avoiding Race Conditions

I almost prefer it to documentation. It basically can’t be wrong.” “What other framework has integrated support for ‘786 TRY IT NOW’ ?” Features Falcon tries to do as little as possible while remaining Falcon Contributors | Logo based on a Vic,-3.1.2008.jpg>photograph by John O'Neill. Created using Sphinx 1.4.8. index modules | next | Falcon Contributors | Logo based on a Vic,-3.1.2008.jpg>photograph by John O'Neill. Created using Sphinx 1.4.8. index modules | next |

niaEelH7w4aQ4Q8w4TfBhxLIcewfEKMO4iHag/k1iL3MOTX5nN1znEnOr4nOjxOd/U539TnT4nOnxOdPic6fE539Tnf1OdHic6vic4k5uuczX5i2I3Y/k50pMXL4VA1EzCW6xixHSZt9o1/6mGDaBuOwRdxmLHZ9mrFTsRGDruZQNYOphX2nY4opYDrHzCG6R8viUjX/ request timeouts are in sync (5317) • Update Markdown Cells example to HTML5 video tag (5411) • Integrated LoginWidget into edit to enable users to logout from the t... (5406) • Update message about minimum Default: 64 The maximum number of items for a container to be introspected for custom serialization. Containers larger than this are pickled outright. Session.key [CBytes] Default: b'' execution key, for signing

niaEelH7w4aQ4Q8w4TfBhxLIcewfEKMO4iHag/k1iL3MOTX5nN1znEnOr4nOjxOd/U539TnT4nOnxOdPic6fE539Tnf1OdHic6vic4k5uuczX5i2I3Y/k50pMXL4VA1EzCW6xixHSZt9o1/6mGDaBuOwRdxmLHZ9mrFTsRGDruZQNYOphX2nY4opYDrHzCG6R8viUjX/ timeouts are in sync (PR #5317) • Update Markdown Cells example to HTML5 video tag (PR #5411) • Integrated LoginWidget into edit to enable users to logout from the t... (PR #5406) • Update message about Default: 64 The maximum number of items for a container to be introspected for custom serialization. Containers larger than this are pickled outright. Session.key [CBytes] Default: b'' execution key, for signing

Markdown Cells example to HTML5 video tag (PR #5411 [https://github.com/jupyter/notebook/pull/5411/]) Integrated LoginWidget into edit to enable users to logout from the t… (PR #5406 [https://github.com/jupy Default: 64 The maximum number of items for a container to be introspected for custom serialization. Containers larger than this are pickled outright. Session.key : CBytes Default: b'' execution key, for aEelH7w4aQ4Q8w4TfBhxLIcewfE KMO4iHag/k1iL3MOTX5nN1znEnOr4nOjxOd/U539TnT4nOn xOdPic6fE539Tnf1OdHic6vic4k5uuczX5i2I3Y/k50pMXL4VA1 EzCW6xixHSZt9o1/6mGDaBuOwRdxmLHZ9mrFTsRGDruZQ NYOphX2nY4opYDrHzCG6R8viUjX/aH4ln1ZNENMGvgpEy

Markdown Cells example to HTML5 video tag (5411 [https://github.com/jupyter/notebook/pull/5411]) Integrated LoginWidget into edit to enable users to logout from the t… (5406 [https://github.com/jupyter Default: 64 The maximum number of items for a container to be introspected for custom serialization. Containers larger than this are pickled outright. Session.key : CBytes Default: b'' execution key, for aEelH7w4aQ4Q8w4TfBhxLIcewfE KMO4iHag/k1iL3MOTX5nN1znEnOr4nOjxOd/U539TnT4nOn xOdPic6fE539Tnf1OdHic6vic4k5uuczX5i2I3Y/k50pMXL4VA1 EzCW6xixHSZt9o1/6mGDaBuOwRdxmLHZ9mrFTsRGDruZQ NYOphX2nY4opYDrHzCG6R8viUjX/aH4ln1ZNENMGvgpEy

任务一直是学术界和产业界共同关注的热点。 自然场景人脸检测在美团业务中也有着广泛的应用需求，为了应对自然场景应用本 身的技术挑战，同时满足业务的性能需求，美团视觉智能中心（Vision Intelligence Center，VIC）从底层算法模型和系统架构两个方面进行了改进，开发了高精度人脸 检测模型 VICFace。而且 VICFace 在国际知名的公开测评集 WIDER FACE 上达 到了行业主流水平。 图 1 自然场景人脸检测样本示例 是一种检测性能和速度平衡的算法，也是当前人脸检测算法优化的主流方向。 三、 优化思路和业务应用 在自然场景应用中，为了同时满足精度需求以及达到实用的目标，美团视觉智能中心 （Vision Intelligence Center，VIC）采用了主流的 Anchor-Based 单阶段人脸检测 算法 < 291 方案，同时在数据增强和采样策略、模型结构设计和损失函数等三方面分别进行了优 化，开发了高精度人脸检测模型 VICFace，以下是相关技术细节的介绍。 [7] Rajamani R. Vehicle Dynamics and Control[M]. Springer Science, 2006. [8] SwaroopD, Yoon S M. Integrated lateral and longitudinal vehicle control foran emergency lane change manoeuvre design[J]. International

usage of functions towards the end. https://images.rawpixel.com/image_800/cHJpdmF0ZS9sci9pbWFnZXMvd2Vic2l0ZS8yMDIyLTA1L2pvYjcxMC0wNTMuanBn.jpg 9Functions A familiar term -- perhaps from your math class

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method on the names array: 1 var names = ["Mohsen", "Hilary", "Justyn", "Amy", "Rich", "Graham", "Vic"] 2 var copiedNames = names.copy() You can prove that the names array has been copied by changing returns a Boolean value of true if all items match and a value of false if they do not. The two containers to be checked do not have to be the same type of container (although they can be), but they do (someContainer: C1, anotherContainer: C2) -> Bool { 5 6 // check that both containers contain the same number of items 7 if someContainer.count != anotherContainer.count {