- Timespec struct definition ＃define HAVE_STRUCT_TIMESPEC. 在基于linux的C编程中，经常会看到 struct timeval和struct timespec 这两个跟时间有关的结构体，有时候会容易混淆，先看下这两个结构体的定义，以linux-2. Jul 13, 2023 · 文章目录一、找不到头文件pthread. #pragma once at the beginning of the header where the struct is defined, it solves the problem. Reload to refresh your session. In this representation, tv_usec is not by itself an absolute time it is a sub second offset off of tv_sec. h>; has microsecond resolution and member tv_usec, and is more or less deprecated)? I assume struct timestruct is a typo for struct timespec. Jul 22, 2016 · Running splint results in warnings that all seem to indicate that splint has no idea of "struct timespec" definition: Code: Select all. I wonder whether Dr. h错误二、“timespec”:“struct”类型重定义三、丢失pthreadVC2. h中，它会尝试声明只的timespec如果可能的话。不过，你可以简单地添加. Pseudo-official glibc docs which you should always check for syscalls: struct timespec { time_t tv_sec; /* seconds */ long tv_nsec; /* nanoseconds */ }; May 28, 2015 · struct timeval represents and instant in time with two members, tv_sec (seconds) and tv_usec (microseconds). struct timespec类型是一种结构类型，可以保存以秒和纳秒为单位的指定时间间隔，也可以表示基于特定纪元的日历时间。该类型至少包含以下两个结构成员：time_t tv_sec; long tv_nsec; 结构成员tv_sec是秒的线性计数，并且可能没有time_t类型的正常语义。 Nov 22, 2020 · 摘要 使用pthreads-w32库时，提示“timespec”:“struct”类型重定义的错误，添加预编译关键字HAVE_STRUCT_TIMESPEC解决问题。 问题 图像处理过程中使用pthreads-w32多线程库(下载)，使用Visual Studio 2017编译时报错： ***\pt Dec 11, 2020 · 文章目录一、找不到头文件pthread. 0-kraxel" to kernel 2. h>; has nanosecond resolution and member tv_nsec) or struct timeval (defined in <sys/time. Return ValueThe length of the string, excluding the null terminator Feb 7, 2025 · The declaration order of tv_sec and tv_nsec is unspecified. May 24, 2019 · `timespec`は、[`timespec_get()`](timespec_get. Is it a "time specification"? Yes. [] NoteThe type of tv_nsec is long long on some platforms, which is currently non-conforming in C++, but is allowed in C since C23. h>会出现找不到头文件的错误，这时候就需要到官网下载pthread开发包。 On 11/10/15 16:13, Gisle Vanem wrote: > Keith Marshall wrote: > >> If you neglect that discrepancy, and your application calls any of the >> pthreads-win32 functions which require a struct timespec * parameter, >> then your application will exhibit undefined behaviour. Dec 24, 2013 · #include <time. h Aug 28, 2020 · what does the name of the timespec struct in time. The type of tv_nsec is long long on some platforms, which is conforming only since C23. Through the GUI: Project Properties (pan) > Property Pages (icon) > Configuration Properties > C/C++ > Preprocessor > Preprocessor Definitions > Edit > Add HAVE_STRUCT_TIMESPEC Dec 23, 2021 · 这篇文章，将介绍c语言中自定义类型之一的结构体。一. h中 #if !defined( PTHREAD_H ) #define PTHREAD_H 下面加上 #define HAVE_STRUCT_TIMESPEC C语言定时器实现：time. h下 进一步查找_kernel_time_t 的含义 可知这两个结构体的内容如下： 小结： 1、struct timeval 的成员，一个是秒，一个是微秒，所以 struct timespec ts; clock_gettime(clk_id, &ts); struct tm *my_tm = localtime(&ts. 다음과 같은 매크로를 포함시켜주게 된다면, pthread. h. 6. timespec (C++17) 定义于头文件 <ctime> struct timespec; (C++17 起) 保有时长的结构体，拆分成秒和纳秒。 timespec Struct Reference Definition at line 63 of file os_time. 10 2024-05-02 timespec #include <time. system_data_types - overview of system data types Jul 5, 2023 · Answer by Killian Burgess in file "C:\MinGW\include\parts\time. h> void *calculator(void *parameter); int main(/*int *argc,char *argv[]*/) { pthread_t thread_obj; pthread_attr Apr 6, 2017 · ALSA depends on types struct timespec and struct timeval. Apr 18, 2017 · ＃define HAVE_STRUCT_TIMESPEC 这将告诉pthreads的，Win32头，你已经有一个适当的timespec，并会让你的代码编译正常。 另外，如果你使用pthreads的广泛应用，你可能要编辑的头文件本身-仅仅是增加的#define HAVE_STRUCT_TIMESPEC某处它附近开始的时候，你是好去进一步阅读: 这里 timespec is defined in the following way into time. h> struct itimerspec {struct timespec it_interval; /* Interval for periodic timer */ struct timespec it_value; /* Initial expiration */ }; DESCRIPTION top Describes the initial expiration of a timer, and its interval, in seconds and nanoseconds. h> header shall also declare the itimerspec structure, which has at least the following members: struct timespec it_interval Timer period. value the user can enter. This structure shall include at least the following member: int sched_priority Process or Structure timespec (C11) struct timespec { time_t tv_sec; // nombre de secondes long tv_nsec; // nombre de nanosecondes }; Cette structure permet de définir un interval exprimé en secondes et en nano-secondes. The documentation for this struct was generated from the following file: timespec' and struct timeval ". zetanumbers opened this issue time_t st_mtime; time_t st_ctime; #else struct timespec st_atim; struct timespec st Mar 26, 2021 · 之前做的游戏项目使用Lua进行的战斗实现 由于Lua脚本存在一定的效率问题，最近正在使用C++对战斗逻辑进行重写 这个问题主要是由于在多个文件中，重复include同一个文件造成的 主要可以使用#ifdef来进行解决，解决方案如下： 在被重复include的文件中，将代码包含在#define与#endif中： #ifndef #define 1) 修改 ts 所指向的 struct timespec 对象，以保有以时间基底 base 表示的当前日历时间。 2) 展开成适用作 timespec_get 的 base 参数的值。 实现可以提供其他以 TIME_ 为首的宏常量，以指示时间基底。 The <time. Its global. It is almost the same as struct timespec, but If you discover any rendering problems in this HTML version of the page, or you believe there is a better or more up- to-date source for the page, or you have corrections or improvements to the information in this COLOPHON (which is not part of the original manual page), send a mail to man-pages@man7. h>. NAME. h 에서 timespec 정의하는 부분이 매크로 부분에서 검사를 통해 컴파일 타임에 매크로 적용이 되지 않아 Jan 27, 2014 · Tour Start here for a quick overview of the site Help Center Detailed answers to any questions you might have Jul 8, 2021 · pthreads的尝试，因为它需要在内部声明，但因为它可能就不需要整个time. h>会出现找不到头文件的错误，这时候就需要到官网下载pthread开发包。 Dec 8, 2021 · struct timespec有两个成员，一个是秒，一个是纳秒, 所以最高精确度是纳秒。 一般由函数int clock_gettime(clockid_t, struct timespec *)获取特定时钟的时间，常用如下4种时钟： Nov 5, 2017 · pthreads的尝试，因为它需要在内部声明，但因为它可能就不需要整个time. h> However, it seems to be of the opinion that GLIBC defines those structures only when an appropriate feature-test macro has been defined, for that header also says: Mar 16, 2019 · #define HAVE_STRUCT_TINMESPEC . com)提供了编程的基础技术教程, 介绍了C、C++、Python, Object-c，Swift，MySQL等各种编程语言的基础知识。 Nov 7, 2021 · 文章浏览阅读713次。一、struct timespec 定义：#ifndef _TIMESPEC#define _TIMESPECtypedef long time_t;struct timespec { time_t tv_sec; // seconds long tv_nsec; // and nanoseconds};#endifstruct timespec有两个成员，一个是秒，一个是纳秒, 所以最高精确度是纳秒。 Apr 16, 2020 · typedef long time_t; #ifndef _TIMESPEC #define _TIMESPEC struct timespec { time_t tv_sec; // seconds long tv_nsec; // and nanoseconds }; #endif struct timespec有两个成员，一个是秒，一个是纳秒, 所以最高精确度是纳秒。 一般由函数int clock_gettime(clockid_t, struct timespec *)获取特定时钟的时间，常用 Jan 22, 2018 · 文章目录一、找不到头文件pthread. */ __syscall_slong_t tv_nsec; /* Nanoseconds May 6, 2016 · @VijayManohar You do. The following structure is used by timer_settime(2), among others: struct itimerspec { struct timespec it_interval; struct timespec it_value; }; Both struct itimerval and struct itimerspec are used to specify when a timer expires. Feb 7, 2025 · Implementation may add other members to struct timespec. Reply reply More replies More replies More replies Nov 27, 2020 · This is highly susceptible to overflow: unsigned int total_ns = t. I think this is a VS2015 change not really related to MKL. h, and removing the struct timespec definition from the same file. Which in turn includes time. */ A struct timespec is a structure that contains, among other things, a member of type time_t called tv_sec. 2) Expands to a value suitable for use as the base argument of timespec_get Other macro constants beginning with TIME_ may be provided by the implementation to indicate additional time bases Sep 18, 2015 · Arrrrrrrrrgh!!!!! Please use the preview facility, and correct your markdown before posting, so I don't have to fix it later. h错误 如果没有下载pthread，在项目中#include <pthread. See Time Types , for a description of struct timespec . Definition at line 50 of file gpr_types. 这将告诉pthreads的，Win32头，你已经有一个适当的timespec，并会让你的代码编译正常。 tv_sec 和 tv_nsec 的声明顺序未指定。 实现可能会向 struct timespec 添加其他成员。. h> from win_time. md)関数によって返される、エポックからの経過時間を表す型である。 各メンバ変数は、以下を意味する： Toggle navigation Jun 9, 2017 · The documentation for this struct was generated from the following file: kern/linux/linux. Notes. Member Data Documentation clock Apr 11, 2011 · I am using the struct timespec structure and here it is: struct timespec { time_t tv_sec; /* Seconds */ long tv_nsec; /* Nanoseconds */ }; Thing is, user will be entering the values for each of these individual members, and i want to put a check a max. 21, there is likely a conflict between the struct timespec declared in <parts/time. By including stdlib. 猿说编程(www. Your problem is essentially the same as the one linkedsomewhere in your chain of included headers there are conflicting definitions of the timespec struct. This should adequately cover dates in the distant future as well as the distant past, as long as they're not more than a couple dozen times the age of the universe. Jan 31, 2019 · Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. h> header shall define the sched_param structure, which shall include the scheduling parameters required for implementation of each supported scheduling policy. 0 modifies struct timespec { time_t tv_sec; // 秒 long tv_nsec; // n（ナノ）秒 }; いささか汎用性に欠けるので、例えば、精度をミリ秒単位までと extern void set_normalized_timespec64(struct timespec64 *ts, time64_t sec, s64 nsec); static inline struct timespec64 timespec64_add(struct timespec64 lhs, struct timespec64 rhs) Jun 29, 2016 · You signed in with another tab or window. std::time_t tv_sec whole seconds – >= 0 C2011 “timespec”:“struct”类型重定义 在pthread. Here is the best way to do this. Jun 17, 2019 · Saved searches Use saved searches to filter your results more quickly Turned out to be my mistake; I moved #include <time. Data Type: struct timeval ¶ struct timeval is an older type for representing a simple calendar time, or an elapsed time, with sub-second resolution. h>会出现找不到头文件的错误，这时候就需要到官网下载pthread开发包。 Mar 20, 2012 · I'd rather not define a whole new wrapper class like timespec_compare_class around timespec (I've seen the syntax of multimap<timespec, fooPtr, timespec_compare_class> in other posts) so I'd rather avoid that if there is a way to do it within class foo itself, or even after the } of foo but still within foo. struct timespec { __time_t tv_sec; /* Seconds. h> #undef timespec And then assert at compile time that both definitions have the same layout: The <time. Do I need to recompile the kernel after adding modifying "videodev2. Note that you do NOT need to write much code to get the time. Parametersstr: A pointer to the beginning of the C-style string. Anyway, I'm aware of this issue; it is a bug in pthreads-w32, (which doesn't have a configure script, so just makes arbitrary, and possibly bogus assumptions, without performing any requisite feature checks). Generally, it_interval specifies the period between successive timer expirations. Apr 18, 2017 · 摘要使用pthreads-w32库时，提示“timespec”:“struct”类型重定义的错误，添加预编译关键字HAVE_STRUCT_TIMESPEC解决问题。问题图像处理过程中使用pthreads-w32多线程库(下载)，使用Visual Studio 2017编译时报错：***\pthreads-w32-2-9-1-release\Pre-built. mk, and there is no similar place for VS. It works even on some peculiar operating systems where the tv_sec member has an unsigned type. Asking for help, clarification, or responding to other answers. The value shall be an expression with type clock_t. c, as it is not necessary anymore, being included in the header. When struct timespec values are supplied to GNU C Library functions, the value in this field must be in the same range. Nov 2, 2016 · You can have the definition of the structure on a header file. struct timespec it_value Timer expiration. Feb 7, 2025 · 1) Modifies the timespec object pointed to by ts to hold the current calendar time in the time base base. hh Nov 21, 2020 · I know this is old, but for future reference: my solution was to #include <time. TimeSpec in the Darwin namespace. May 8, 2014 · 一、struct timespec 定义： typedef long time_t; #ifndef _TIMESPEC #define _TIMESPEC struct timespec {time_t tv_sec; // seconds long tv_nsec; // and nanoseconds }; #endif struct timespec有两个成员，一个是秒，一个是纳秒, 所以最高精确度是纳秒。 C++中使用std::strlen函数的常见错误及排除方法 . Supergood's advice above, by referring to simthread. h, you include sys/types. h> header shall declare the structure timespec, which has at least the following members: time_t tv_sec Seconds. h> #include<stdlib. Functions that deal with timespecs should be helpful. h> header shall also declare the itimerspec structure, which shall include at least the following members: struct timespec it_interval Timer period. Have a look at /usr/include/time. Provide details and share your research! But avoid …. h" correct the problem. Apr 11, 2004 · Detailed Description struct timespec64 is just like the unix 'struct timespec' except that we use a 64-bit signed int to store the seconds. If yes, then what does that mean? Looking at oxford specification meaning and also of time, a "time specification" or timespec structure in this context means: struct timespec it_interval Timer period. #include <time. struct timespec有两个成员，一个是秒，一个是纳秒, 所以最高精确度是纳秒。 Feb 18, 2019 · Your ultimate goal is to get the current time as a struct timespec and then copy the value of that struct into the location provided by the user using copy_to_user. */ struct timespec st_ctim; /* Time of last status change. May 2, 2024 · The following will return an ISO8601 and RFC3339-compliant UTC timestamp, including nanoseconds. tv_nsec + (t. > > Look in PtW32 sources who this struct is used. ,Do please note, that if you are mixing a stock pre-built pthreads-w32 library along with mingwrt-3. Function: int clock_gettime (clockid_t clock, struct timespec *ts) ¶ Get the current time according to the clock identified by clock , storing it as seconds and nanoseconds in * ts . c -o test -std=c99 -D_GNU_SOURCE. man 2 nanosleep. . I should be #include<pthread. struct timespec; (since C++17) Structure holding an interval broken down into seconds and nanoseconds. I feel like this is a juggling problem. org Linux man-pages 6. ＃define HAVE_STRUCT_TIMESPEC 这将告诉pthreads的，Win32头，你已经有一个适当的timespec，并会让你的代码编译正常。 Jan 30, 2025 · About: LTP (Linux Test Project) is a joint project with SGI, IBM, OSDL, and Bull with a goal to deliver test suites to the open source community that validate the reliability, robustness, and stability of Linux. , MinGW - Minimalist GNU for Windows , Newsletters Articles Create Top Oct 21, 2015 · How to convert this into a struct timespec so I can compare with the st_atim, st_mtim, and st_ctim struct timespec's returned from the stat() function? This post talks about strptime and sscanf, and I also found strftime , but all these convert to a struct time_t or struct tm or integer values. Aug 7, 2017 · Are you looking for struct timespec (defined in <time. Supergood has any ideas? Edit: I think that I have fixed this based on Dr. 2\include\pthread. h rather than pthread. I was slightly wrong in my previous comment. h> #undef timespec 然后在编译时断言这两个定义具有相同的布局： 代码语言： javascript Jul 24, 2018 · Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand May 21, 2022 · Incorrect newlib stat struct definition #2795. */ struct timespec st_mtim; /* Time of last modification. 35为例，在time. May 10, 2024 · 下面是struct itimerspec结构体的定义： ```c struct timespec { time_t tv_sec; /* seconds */ long tv_nsec; /* nanoseconds */ }; struct itimerspec { struct timespec it_interval; /* timer interval */ struct timespec it_value; /* timer expiration */ }; ``` 其中，timespec结构体用于表示时间，包含了两个成员变量：tv_sec Jun 22, 2012 · The solution was to add HAVE_STRUCT_TIMESPEC to the Preprocessor Definitions. h header therefore appropriately does this: /* for timeval and timespec */ #include <time. struct timespec st_atim; /* Time of last access. h高级技巧与最佳实践 Dec 6, 2017 · 文章目录一、找不到头文件pthread. 简单介绍首先我们必须要了解三点：什么是结构体，结构体是如何声明，我们为什么需要结构体；那么什么是结构体？ line 29 #define HAVE_STRUCT_TIMESPEC and the build finishes without errors. struct timespec works the same way except that instead of microseconds it's offset (tv_nsec) is stored in nanosecond units. Learn more about the Darwin. 一、struct timespec 定义： typedef long time_t; #ifndef _TIMESPEC #define _TIMESPEC struct timespec { time_t tv_sec; // seconds long tv_nsec; // and nanoseconds }; #endif. h> to the top of my file to fix a different duplicate definition problem (struct timespec). The <sched. h> in file win_time. 1)修改 ts 指向的 timespec 对象以保存时间基 base 中的当前日历时间。 2) 扩展为适合用作 timespec_get 的 base 参数的值 实现中可以提供以 TIME_ 开头的其他宏常量来指示额外的时间基准 Mar 17, 2016 · I had to add HAVE_STRUCT_TIMESPEC to compile with VS2015 or Intel XE 2016 as well. tv_sec); // This define is required to bring in some of the extra POSIX features Jan 11, 2014 · Sourceware Bugzilla – Bug 16437 [x86_64] struct timespec definition is non-conforming on x32 and perhaps other archs Last modified: 2025-01-16 21:16:36 UTC #define HAVE_STRUCT_TIMESPEC 다음 코드를 코드 상단에 또는 전처리기에 포함시켜주면 해결이 되는 문제였습니다. Have. You signed out in another tab or window. tv_nsec 的类型在某些平台上为 long long ，自 C23 起才符合要求。 Mar 8, 2023 · 之前做的游戏项目使用Lua进行的战斗实现 由于Lua脚本存在一定的效率问题，最近正在使用C++对战斗逻辑进行重写 这个问题主要是由于在多个文件中，重复include同一个文件造成的 主要可以使用#ifdef来进行解决，解决方案如下： 在被重复include的文件中，将代码包含在#define与#endif中： #ifndef #define It is often necessary to subtract two values of type struct timeval or struct timespec. h but we do not IIRC and set the HAVE_* in kaldi. Implementation may add other data members to timespec. h> #define timespec linux_timespec #include <linux/time. gcc test. We can then remove #include <time. I found some references, but don't know how to fix proper. h> header shall define the timespec structure as described in <time. Jan 30, 2025 · About: LTP (Linux Test Project) is a joint project with SGI, IBM, OSDL, and Bull with a goal to deliver test suites to the open source community that validate the reliability, robustness, and stability of Linux. Oct 2, 2016 · #define HAVE_STRUCT_TIMESPEC #endif Given that this file is not staged, this is a very unsatisfactory way of doing things, but I am not sure why it is necessary. h" ? But kraxel's patch of "patch-2. CLOCKS_PER_SEC A number used to convert the value returned by the clock function into seconds. h > 2 、函数原型 time_t time (time_t * timer) 函数返回从TC1970-1-1 0: 0: 0 开始到现在的秒数 用 time 函数结合其他函数（如：localtime、gmtime、asctime、ctime）可以获得当前系统时间或是标准时间。 Jun 1, 2018 · pthreads的尝试，因为它需要在内部声明，但因为它可能就不需要整个time. On some machines, absolute times may be in local time. Member objects. 为什么要在将文件移动到vs文件夹内之前修改呢？ 第一：如果先将文件移动到 vs之后，vs会以需要开启管理员权限才可以修改来限制我们对该文件的保存，所以还不如在外面先改了再放进去。 The <sched. long tv_nsec Nanoseconds. This is the preprocessor conditional that wraps the timespec definition. h from the C standard library stand for? Time specification. Command to display timespec manual in Linux: $ man 3 timespec. Mar 3, 2016 · 以下内容是CSDN社区关于error C2011: 'timespec': 'struct' type redefinition相关内容，如果想了解更多关于C++ 语言社区其他内容，请访问 Adding -D_GNU_SOURCE to your CFLAGS will also work. h>会出现找不到头文件的错误，这时候就需要到官网下载pthread开发包。 Jun 3, 2013 · 上次讲了alarm后，大致看了一下内核的时间表示，所以就记录一下。一、时间的表示方法：Linux内核中表示时间的结构体和数据类型有5种：struct timeval; struct timespec; struct timezone; struct tm; time_t; struct rtc_ti Feb 18, 2025 · 这是一个定义具有最大数量元素的 timespec 结构体数组 timestamps，并初始化数组中的所有元素为0的语句。可以通过以下方式实现： ``` #define MAX_TIMESTAMPS 10 // 定义最大数量为10 struct timespec timestamps[MAX_TIMESTAMPS] = {0}; // 初始化数组中的所有元素为0 ``` 注意，此处使用了 C 语言的数组初始化语法，即在定义 Analogous to struct timespec. You switched accounts on another tab or window. h中， 它会尝试声明只的timespec如果可能的话。不过，你可以简单地添加 ＃define HAVE_STRUCT_TIMESPEC 这将告诉pthreads的，Win32头，你已经有一个适当的timespec，并会让你的代码编译正常。 timespec (3) - Linux Manuals timespec: overview of system data types. It uses strftime(), which works with struct timespec just as well as with struct timeval because all it cares about is the number of seconds, which both provide. – struct timespec 和 struct timeval time()提供了秒级的精确度 . nanosleep requires a pointer to a struct timespec as defined by the C library. (Other member allows for higher resolution timestamps. 1 、头文件 < time. tv_sec * (MAX_NS+1)); The whole reason we have struct timespec is that we might need to represent values outside the range of the integer types. struct timespec it_interval Timer period. Any epoch is irrelevant. The <time. codersrc. h> #include<stdio. ) Nov 10, 2015 · The header shall declare the timespec structure, which shall > include at least the following members: time_t tv_sec Seconds. dll四、应用程序无法正常启动0xc000007b解决方法 一、找不到头文件pthread. struct timespec is only ever used by the standard library to specify an interval, not an absolute time. h>, and the declaration assumed by the pthread library. h> header shall define the following macros: NULL As described in <stddef. Many packages have a config. jjqqn rwyba bnpsqb egxoeoq ogmdzxl lkyt tgxpx fpgo mktpqv hce pjvjyp hxeot vgbblv vkzld ekam