Dr. Dobb's Journal - October 2007 - (Page 40) State of the Art MEMORY-AWARE COMPONENTS continued from page 38 memory reserved. If that reserved memory can be reused to keep your program alive in Program is running the face of otherwise overwhelming memory pressure, then your watchdog has earned its keep. DDJ Program is running Detect exception caused by access of read/write protected memory region Detect out-of-memory condition or exception Search for region in list of tracked virtual memory regions Tracking any virtual memory regions that were reserved by a component other than the one that raised the out-of memory condition? No Yes Unreserve the other components’ resereved region that has the earliest tracked timestamp Region was stolen? Yes No Pass an exception to the program Retry the operation that caused the out-of-memory condition No User has chosen to log diagnostic information? Yes Log the current call chain, along with the recorded call chains associated with the unused reserved regions and unused committed pages No Tracking any committed virtual memory regions that have timestamped pages? Compare current call chain with recorded call chain: Was exception raised within the component that stole the region? Yes Program continues running Unprotect the region No Invoke our handler for out-of-memory conditions to steal another region (if possible) for use by the component that raised the exception Yes Scan the page with the earliest tracked timestamp to determine whether it has been initialized Complete the operation that raised the exception Program exits with unhandled out-of-memory exception No Decommit and unreserve the uninitialized page Program continues running Protect the region again Has page been intitalized? Yes Remove timestamp associated with page Figure 4 Figure 5 40 Dr. Dobb’s Journal l www.ddj.com l October 2007 http://www.iocomp.com http://www.iocomp.com http://www.ddj.com
Table of Contents Feed for the Digital Edition of Dr. Dobb's Journal - October 2007 Cover Contents Hmmmm Alia Vox Developer Diaries Developer’s Notebook AI: It’s OK Again! Conversations Visual Cryptography and Bit-Plane Complexity Segmentation Inside the Windows Vista Disk Encryption Algorithm Memory-Aware Components Software and the Core Description Process Logging In C++ Effective Concurrency The Agile Edge Swaine’s Flames Dr. Dobb's Journal - October 2007 Dr. Dobb's Journal - October 2007 - Cover (Page Cover1) Dr. Dobb's Journal - October 2007 - Cover (Page Cover2) Dr. Dobb's Journal - October 2007 - Cover (Page 1) Dr. Dobb's Journal - October 2007 - Cover (Page 2) Dr. Dobb's Journal - October 2007 - Cover (Page 3) Dr. Dobb's Journal - October 2007 - Contents (Page 4) Dr. Dobb's Journal - October 2007 - Contents (Page 5) Dr. Dobb's Journal - October 2007 - Hmmmm (Page 6) Dr. Dobb's Journal - October 2007 - Hmmmm (Page 7) Dr. Dobb's Journal - October 2007 - Hmmmm (Page 8) Dr. Dobb's Journal - October 2007 - Hmmmm (Page 9) Dr. Dobb's Journal - October 2007 - Alia Vox (Page 10) Dr. Dobb's Journal - October 2007 - Alia Vox (Page 11) Dr. Dobb's Journal - October 2007 - Developer Diaries (Page 12) Dr. Dobb's Journal - October 2007 - Developer Diaries (Page 13) Dr. Dobb's Journal - October 2007 - Developer’s Notebook (Page 14) Dr. Dobb's Journal - October 2007 - Developer’s Notebook (Page 15) Dr. Dobb's Journal - October 2007 - AI: It’s OK Again! (Page 16) Dr. Dobb's Journal - October 2007 - AI: It’s OK Again! (Page 17) Dr. Dobb's Journal - October 2007 - AI: It’s OK Again! (Page 18) Dr. Dobb's Journal - October 2007 - AI: It’s OK Again! (Page 19) Dr. Dobb's Journal - October 2007 - Conversations (Page 20) Dr. Dobb's Journal - October 2007 - Conversations (Page 21) Dr. Dobb's Journal - October 2007 - Visual Cryptography and Bit-Plane Complexity Segmentation (Page 22) Dr. Dobb's Journal - October 2007 - Visual Cryptography and Bit-Plane Complexity Segmentation (Page 23) Dr. Dobb's Journal - October 2007 - Visual Cryptography and Bit-Plane Complexity Segmentation (Page 24) Dr. Dobb's Journal - October 2007 - Visual Cryptography and Bit-Plane Complexity Segmentation (Page 25) Dr. Dobb's Journal - October 2007 - Visual Cryptography and Bit-Plane Complexity Segmentation (Page 26) Dr. Dobb's Journal - October 2007 - Visual Cryptography and Bit-Plane Complexity Segmentation (Page 27) Dr. Dobb's Journal - October 2007 - Visual Cryptography and Bit-Plane Complexity Segmentation (Page 28) Dr. Dobb's Journal - October 2007 - Visual Cryptography and Bit-Plane Complexity Segmentation (Page 29) Dr. Dobb's Journal - October 2007 - Inside the Windows Vista Disk Encryption Algorithm (Page 30) Dr. Dobb's Journal - October 2007 - Inside the Windows Vista Disk Encryption Algorithm (Page 31) Dr. Dobb's Journal - October 2007 - Inside the Windows Vista Disk Encryption Algorithm (Page 32) Dr. Dobb's Journal - October 2007 - Inside the Windows Vista Disk Encryption Algorithm (Page 33) Dr. Dobb's Journal - October 2007 - Memory-Aware Components (Page 34) Dr. Dobb's Journal - October 2007 - Memory-Aware Components (Page 35) Dr. Dobb's Journal - October 2007 - Memory-Aware Components (Page 36) Dr. Dobb's Journal - October 2007 - Memory-Aware Components (Page 37) Dr. Dobb's Journal - October 2007 - Memory-Aware Components (Page 38) Dr. Dobb's Journal - October 2007 - Memory-Aware Components (Page 39) Dr. Dobb's Journal - October 2007 - Memory-Aware Components (Page 40) Dr. Dobb's Journal - October 2007 - Memory-Aware Components (Page 41) Dr. Dobb's Journal - October 2007 - Software and the Core Description Process (Page 42) Dr. Dobb's Journal - October 2007 - Software and the Core Description Process (Page 43) Dr. Dobb's Journal - October 2007 - Software and the Core Description Process (Page 44) Dr. Dobb's Journal - October 2007 - Software and the Core Description Process (Page 45) Dr. Dobb's Journal - October 2007 - Software and the Core Description Process (Page 46) Dr. Dobb's Journal - October 2007 - Software and the Core Description Process (Page 47) Dr. Dobb's Journal - October 2007 - Software and the Core Description Process (Page 48) Dr. Dobb's Journal - October 2007 - Software and the Core Description Process (Page 49) Dr. Dobb's Journal - October 2007 - Logging In C++ (Page 50) Dr. Dobb's Journal - October 2007 - Logging In C++ (Page 51) Dr. Dobb's Journal - October 2007 - Logging In C++ (Page 52) Dr. Dobb's Journal - October 2007 - Logging In C++ (Page 53) Dr. Dobb's Journal - October 2007 - Logging In C++ (Page 54) Dr. Dobb's Journal - October 2007 - Logging In C++ (Page 55) Dr. Dobb's Journal - October 2007 - Logging In C++ (Page 56) Dr. Dobb's Journal - October 2007 - Effective Concurrency (Page 57) Dr. Dobb's Journal - October 2007 - Effective Concurrency (Page 58) Dr. Dobb's Journal - October 2007 - Effective Concurrency (Page 59) Dr. Dobb's Journal - October 2007 - The Agile Edge (Page 60) Dr. Dobb's Journal - October 2007 - The Agile Edge (Page 61) Dr. Dobb's Journal - October 2007 - The Agile Edge (Page 62) Dr. Dobb's Journal - October 2007 - The Agile Edge (Page 63) Dr. Dobb's Journal - October 2007 - Swaine’s Flames (Page 64) Dr. Dobb's Journal - October 2007 - Swaine’s Flames (Page Cover3) Dr. Dobb's Journal - October 2007 - Swaine’s Flames (Page Cover4)
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