struct

问题 How to extract PCB in linux? or Is there any kernel module available to read it? 回答1: The closest Linux equivalent is the task_struct ; however, that's only used inside the kernel. It's not exported to userspace. All information on running processes on Linux is exposed via procfs , which is mounted at /proc . See man proc for details on what's available and where. 来源： https://stackoverflow.com/questions/8162956/process-control-block-in-linux

问题 How to extract PCB in linux? or Is there any kernel module available to read it? 回答1: The closest Linux equivalent is the task_struct ; however, that's only used inside the kernel. It's not exported to userspace. All information on running processes on Linux is exposed via procfs , which is mounted at /proc . See man proc for details on what's available and where. 来源： https://stackoverflow.com/questions/8162956/process-control-block-in-linux

问题 I'm making a 2D platformer game and to represent a level I'm using 2D array of tiles which are classes with fields for position, type and various flags. When I change the class key word in the tile class to struct , a loaded map consumes about 20% less memory. I don't know about rights and wrongs of this action, I just want to know why the difference in memory consumption. Edit: numbers are 1038 MB with tiles as classes and 845 MB as structs (without most of game data). 回答1: An array of

问题 In embedded programming when describing the hardware one often needs to place struct elements at known predefined positions as the HW engineer designed them. For example, let's define a structure FPGA, which has some 100 registers/areas as in the following simplified example: struct __attribute__ ((__packed__)) sFPGA { uchar Spare1[0x24]; ushort DiscreteInput; uchar Spare2[0x7A]; //CPLD_Version is required to be at offset 0xA0, so 0xA0-0x24-2=0x7A ushort CPLD_Version; }; Now, I am frustrated

问题 In embedded programming when describing the hardware one often needs to place struct elements at known predefined positions as the HW engineer designed them. For example, let's define a structure FPGA, which has some 100 registers/areas as in the following simplified example: struct __attribute__ ((__packed__)) sFPGA { uchar Spare1[0x24]; ushort DiscreteInput; uchar Spare2[0x7A]; //CPLD_Version is required to be at offset 0xA0, so 0xA0-0x24-2=0x7A ushort CPLD_Version; }; Now, I am frustrated

问题 In embedded programming when describing the hardware one often needs to place struct elements at known predefined positions as the HW engineer designed them. For example, let's define a structure FPGA, which has some 100 registers/areas as in the following simplified example: struct __attribute__ ((__packed__)) sFPGA { uchar Spare1[0x24]; ushort DiscreteInput; uchar Spare2[0x7A]; //CPLD_Version is required to be at offset 0xA0, so 0xA0-0x24-2=0x7A ushort CPLD_Version; }; Now, I am frustrated

问题 Is it possible to do something like the following in C, to print a different-but-similar struct type? #include<stdio.h> typedef struct Car { char* name; unsigned int cost } Car; typedef struct Animal { char* name; unsigned int age; unsigned int weight } Animal; void print_struct(void *obj) { printf("The name is: %s\n", obj->name); }; int main(void) { Animal *dog = & (Animal) {.name = "Dog", .age = 10, .weight = 200}; Car *ford = & (Car) {.name = "Ford", .cost = 50000}; print_struct(dog); };

问题 Is it possible to do something like the following in C, to print a different-but-similar struct type? #include<stdio.h> typedef struct Car { char* name; unsigned int cost } Car; typedef struct Animal { char* name; unsigned int age; unsigned int weight } Animal; void print_struct(void *obj) { printf("The name is: %s\n", obj->name); }; int main(void) { Animal *dog = & (Animal) {.name = "Dog", .age = 10, .weight = 200}; Car *ford = & (Car) {.name = "Ford", .cost = 50000}; print_struct(dog); };

问题 I want to know if there is any way to convert a string like "5ABBF13A000A01" to the next struct using struct and union method: struct xSensorData2{ unsigned char flags; unsigned int refresh_rate; unsigned int timestamp; }; Data should be: flags = 0x01 (last byte); refresh_rate = 0x000A (two bytes); timestamp = 5ABBF13A (four bytes); I'm thinking in next struct of data: struct xData{ union{ struct{ unsigned char flags:8; unsigned int refresh_rate:16; unsigned int timestamp:32; }; char pcBytes

问题 I want to know if there is any way to convert a string like "5ABBF13A000A01" to the next struct using struct and union method: struct xSensorData2{ unsigned char flags; unsigned int refresh_rate; unsigned int timestamp; }; Data should be: flags = 0x01 (last byte); refresh_rate = 0x000A (two bytes); timestamp = 5ABBF13A (four bytes); I'm thinking in next struct of data: struct xData{ union{ struct{ unsigned char flags:8; unsigned int refresh_rate:16; unsigned int timestamp:32; }; char pcBytes