Some C/C++ code targeted for GNU family compilers fail to compile under Windows due to the dependency on sys/time.h header file. The repository here has provided a neat implementation for it. Basically you need these three files: time.h, times.h and times.cpp. I have included them here (in case the repository ever went dead). Note that this is not my code and the original license of the code was LGPL.
sys/time.h:
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#pragma once #ifndef _TIMES_H #include "sys/times.h" #endif |
sys/times.h:
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#ifndef _TIMES_H #define _TIMES_H #ifdef _WIN32 #include <sys/timeb.h> #include <sys/types.h> #include <winsock2.h> int gettimeofday(struct timeval* t,void* timezone); // from linux's sys/times.h //#include <features.h> #define __need_clock_t #include <time.h> /* Structure describing CPU time used by a process and its children. */ struct tms { clock_t tms_utime; /* User CPU time. */ clock_t tms_stime; /* System CPU time. */ clock_t tms_cutime; /* User CPU time of dead children. */ clock_t tms_cstime; /* System CPU time of dead children. */ }; /* Store the CPU time used by this process and all its dead children (and their dead children) in BUFFER. Return the elapsed real time, or (clock_t) -1 for errors. All times are in CLK_TCKths of a second. */ clock_t times (struct tms *__buffer); typedef long long suseconds_t ; #endif #endif |
sys/time.cpp:
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#include "sys/times.h" int gettimeofday(struct timeval* t,void* timezone) { struct _timeb timebuffer; _ftime( &timebuffer ); t->tv_sec=timebuffer.time; t->tv_usec=1000*timebuffer.millitm; return 0; } clock_t times (struct tms *__buffer) { __buffer->tms_utime = clock(); __buffer->tms_stime = 0; __buffer->tms_cstime = 0; __buffer->tms_cutime = 0; return __buffer->tms_utime; } |
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Thanks Mehran jan!
It’s very helpful.
With Cuda 8, the following code needs to be added into times.h:
struct timezone {
int tz_minuteswest; /* minutes west of Greenwich */
int tz_dsttime; /* type of DST correction */
};
you can add as well stucture
struct timespec {
time_t tv_sec; /* seconds */
long tv_nsec; /* and nanoseconds */
};
Where need I to add the files (“sys/time.h”,…)? Inside the project?
Author
Yes, and note that it should be “sys/time.h” (not) so that it can be found in the local project files (not system include dir).
Hi,
For some reason I’m unable to get this to work as clock_t hasn’t been declared anywhere. It should be in time.h, but hasn’t been in this above case. Any help would be great.
Cheers
James