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https://github.com/git-for-windows/git.git
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The Git project is not exactly the easiest project to get started in: it's written in C and POSIX shell, with bits of Perl, Rust and other languages sprinkled into it. On top of that, the project has grown somewhat organically over time, making the codebase hard to navigate. These are problems that we're aware of, and there have been and still are efforts to clean up some of the technical debt that is natural to exist an a project that is more than 20 years old. Furthermore, we provide resources to newcomers that help them out like our coding guidelines, code of conduct or "MyFirstContribution.adoc". But there is a rather practical problem: finding your way around in our project's tree is not easy. Doing a directory listing in the top-level directory will present you with more than 550 files, which makes it extremely hard for a newcomer to figure out what files they are even supposed to look at. This makes the onboarding experience somewhat harder than it really needs to be. This isn't only a problem for newcomers though, as I myself struggle to find the files I am looking for because of the sheer number of files. Besides the problem of discoverability it also creates a problem of structure. It is not obvious at all which files are part of "libgit.a" and which files are only linked into our final executables. So while we have this split in our build systems, that split is not evident at all in our tree. Introduce a new "lib/" directory and move all of our sources for "libgit.a" into it to fix these issues. It makes the split we have evident and reduces the number of files in our top-level tree from 550 files to ~80 files. This is still a lot of files, but it's significantly easier to navigate already. Furthermore, we can further iterate after this step and think about introducing a better structure for remaining files, as well. Signed-off-by: Patrick Steinhardt <ps@pks.im> Signed-off-by: Junio C Hamano <gitster@pobox.com>
126 lines
2.6 KiB
C
126 lines
2.6 KiB
C
#include "git-compat-util.h"
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#include "thread-utils.h"
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#if defined(hpux) || defined(__hpux) || defined(_hpux)
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# include <sys/pstat.h>
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#endif
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/*
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* By doing this in two steps we can at least get
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* the function to be somewhat coherent, even
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* with this disgusting nest of #ifdefs.
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*/
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#ifndef _SC_NPROCESSORS_ONLN
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# ifdef _SC_NPROC_ONLN
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# define _SC_NPROCESSORS_ONLN _SC_NPROC_ONLN
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# elif defined _SC_CRAY_NCPU
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# define _SC_NPROCESSORS_ONLN _SC_CRAY_NCPU
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# endif
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#endif
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int online_cpus(void)
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{
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#ifdef NO_PTHREADS
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return 1;
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#else
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#ifdef _SC_NPROCESSORS_ONLN
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long ncpus;
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#endif
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#ifdef GIT_WINDOWS_NATIVE
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SYSTEM_INFO info;
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GetSystemInfo(&info);
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if ((int)info.dwNumberOfProcessors > 0)
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return (int)info.dwNumberOfProcessors;
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#elif defined(hpux) || defined(__hpux) || defined(_hpux)
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struct pst_dynamic psd;
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if (!pstat_getdynamic(&psd, sizeof(psd), (size_t)1, 0))
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return (int)psd.psd_proc_cnt;
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#elif defined(HAVE_BSD_SYSCTL) && defined(HW_NCPU)
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int mib[2];
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size_t len;
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int cpucount;
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mib[0] = CTL_HW;
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# ifdef HW_AVAILCPU
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mib[1] = HW_AVAILCPU;
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# elif defined(HW_NCPUONLINE)
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mib[1] = HW_NCPUONLINE;
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# else
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mib[1] = HW_NCPU;
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# endif /* HW_AVAILCPU */
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len = sizeof(cpucount);
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if (!sysctl(mib, 2, &cpucount, &len, NULL, 0))
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return cpucount;
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#endif /* defined(HAVE_BSD_SYSCTL) && defined(HW_NCPU) */
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#ifdef _SC_NPROCESSORS_ONLN
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if ((ncpus = (long)sysconf(_SC_NPROCESSORS_ONLN)) > 0)
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return (int)ncpus;
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#endif
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return 1;
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#endif
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}
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int init_recursive_mutex(pthread_mutex_t *m)
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{
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#ifndef NO_PTHREADS
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pthread_mutexattr_t a;
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int ret;
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ret = pthread_mutexattr_init(&a);
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if (!ret) {
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ret = pthread_mutexattr_settype(&a, PTHREAD_MUTEX_RECURSIVE);
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if (!ret)
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ret = pthread_mutex_init(m, &a);
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pthread_mutexattr_destroy(&a);
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}
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return ret;
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#else
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return 0;
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#endif
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}
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#ifdef NO_PTHREADS
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int dummy_pthread_create(pthread_t *pthread, const void *attr,
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void *(*fn)(void *), void *data)
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{
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/*
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* Do nothing.
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*
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* The main purpose of this function is to break compiler's
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* flow analysis and avoid -Wunused-variable false warnings.
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*/
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return ENOSYS;
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}
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int dummy_pthread_init(void *data)
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{
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/*
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* Do nothing.
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*
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* The main purpose of this function is to break compiler's
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* flow analysis or it may realize that functions like
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* pthread_mutex_init() is no-op, which means the (static)
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* variable is not used/initialized at all and trigger
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* -Wunused-variable
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*/
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return ENOSYS;
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}
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int dummy_pthread_join(pthread_t pthread, void **retval)
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{
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/*
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* Do nothing.
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*
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* The main purpose of this function is to break compiler's
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* flow analysis and avoid -Wunused-variable false warnings.
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*/
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return ENOSYS;
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}
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#endif
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