memory

问题 I wish to determine if the following program (an implementation of finding the maximum sub-array) leaks memory. Is there a general way to determine this? Such as using some feature of a debugger? What are general strategies? struct Interval { int max_left; int max_right; int sum; }; struct Interval * max_crossing_subarray(int A[], int low, int mid, int high) { struct Interval * crossing = malloc(sizeof(struct Interval)); int left_sum = INT_MIN; int sum = 0; for(int i = mid; i >= low; --i) {

问题 I wish to determine if the following program (an implementation of finding the maximum sub-array) leaks memory. Is there a general way to determine this? Such as using some feature of a debugger? What are general strategies? struct Interval { int max_left; int max_right; int sum; }; struct Interval * max_crossing_subarray(int A[], int low, int mid, int high) { struct Interval * crossing = malloc(sizeof(struct Interval)); int left_sum = INT_MIN; int sum = 0; for(int i = mid; i >= low; --i) {

问题 This question already has answers here : Are references stored on the heap or stack? (4 answers) Closed 4 years ago . I know that reference does not take any memory it will point to the same memory location which it is referencing. for eg int i=10; int &r = a; suppose i points to the memory location 1000 so in this case r will also point to the memory location 1000. But in C++ whenever we are declaring a variable it will get stored in the memory at some location. In this case r is pointing to

问题 I get this error on my UNIX server, when running my java server: Exception in thread "Thread-0" java.lang.OutOfMemoryError: unable to create new native thread at java.lang.Thread.start0(Native Method) at java.lang.Thread.start(Thread.java:640) at [... where ever I launch a new Thread ...] It happens everytime I have about 600 threads running. I have set up this variable on the server: $> ulimit -s 128 What looks strange to me is the result of this command, which I ran when the bug occured the

问题 Here is my use case. A legacy system updates a database queue table QUEUE. I want a scheduled recurring job that - checks the contents of QUEUE - if there are rows in the table it locks the row and does some work - deletes the row in QUEUE If the previous job is still running, then a new thread will be created to do the work. I want to configure the maximum number of concurrent threads. I am using Spring 3 and my current solution is to do the following (using a fixedRate of 1 millisecond to

问题 Here is my use case. A legacy system updates a database queue table QUEUE. I want a scheduled recurring job that - checks the contents of QUEUE - if there are rows in the table it locks the row and does some work - deletes the row in QUEUE If the previous job is still running, then a new thread will be created to do the work. I want to configure the maximum number of concurrent threads. I am using Spring 3 and my current solution is to do the following (using a fixedRate of 1 millisecond to

问题 This question already has answers here : Does a memory address point to a byte of information? (2 answers) Closed last year . On a 64bit machine, we know that an address is 8 bytes. However, I am not entirely clear how many bytes of information is in one address. Does every byte in virtual memory have an address? Or does every 64 bits in memory have an address? Or does it depend on the architecture? If it depends on the architecture, then how should I find out? 回答1: Your question is related

问题 This question already has answers here : Does a memory address point to a byte of information? (2 answers) Closed last year . On a 64bit machine, we know that an address is 8 bytes. However, I am not entirely clear how many bytes of information is in one address. Does every byte in virtual memory have an address? Or does every 64 bits in memory have an address? Or does it depend on the architecture? If it depends on the architecture, then how should I find out? 回答1: Your question is related

问题 This question already has answers here : Does a memory address point to a byte of information? (2 answers) Closed last year . On a 64bit machine, we know that an address is 8 bytes. However, I am not entirely clear how many bytes of information is in one address. Does every byte in virtual memory have an address? Or does every 64 bits in memory have an address? Or does it depend on the architecture? If it depends on the architecture, then how should I find out? 回答1: Your question is related

问题 The C standard states (emphasize mine): 28 A pointer to void shall have the same representation and alignment requirements as a pointer to a character type. 48) Similarly, pointers to qualified or unqualified versions of compatible types shall have the same representation and alignment requirements. All pointers to structure types shall have the same representation and alignment requirements as each other. All pointers to union types shall have the same representation and alignment