diff options
| author | Nico Weber <thakis@chromium.org> | 2020-07-14 16:41:59 -0400 |
|---|---|---|
| committer | Andreas Kling <kling@serenityos.org> | 2020-07-15 00:07:20 +0200 |
| commit | 4eb967b5ebd5ca7a00049c7f958011e54b975040 (patch) | |
| tree | 25da6871473ae3484cf3c1c894b287b8be42626c /Kernel | |
| parent | 782cd93c012bcad8a96dfd67aeb782ef49d380f9 (diff) | |
| download | serenity-4eb967b5ebd5ca7a00049c7f958011e54b975040.zip | |
LibC+Kernel: Start implementing sysconf
For now, only the non-standard _SC_NPROCESSORS_CONF and
_SC_NPROCESSORS_ONLN are implemented.
Use them to make ninja pick a better default -j value.
While here, make the ninja package script not fail if
no other port has been built yet.
Diffstat (limited to 'Kernel')
| -rw-r--r-- | Kernel/API/Syscall.h | 3 | ||||
| -rw-r--r-- | Kernel/Arch/i386/CPU.h | 2 | ||||
| -rw-r--r-- | Kernel/Process.cpp | 11 | ||||
| -rw-r--r-- | Kernel/Process.h | 1 | ||||
| -rw-r--r-- | Kernel/UnixTypes.h | 5 |
5 files changed, 21 insertions, 1 deletions
diff --git a/Kernel/API/Syscall.h b/Kernel/API/Syscall.h index 8c11349c16..8412971bf6 100644 --- a/Kernel/API/Syscall.h +++ b/Kernel/API/Syscall.h @@ -191,7 +191,8 @@ namespace Kernel { __ENUMERATE_SYSCALL(ptrace) \ __ENUMERATE_SYSCALL(minherit) \ __ENUMERATE_SYSCALL(sendfd) \ - __ENUMERATE_SYSCALL(recvfd) + __ENUMERATE_SYSCALL(recvfd) \ + __ENUMERATE_SYSCALL(sysconf) namespace Syscall { diff --git a/Kernel/Arch/i386/CPU.h b/Kernel/Arch/i386/CPU.h index 95f8980a50..de90cd6dc9 100644 --- a/Kernel/Arch/i386/CPU.h +++ b/Kernel/Arch/i386/CPU.h @@ -744,6 +744,8 @@ public: static Processor& by_id(u32 cpu); + static size_t processor_count() { return processors().size(); } + template<typename Callback> static inline IterationDecision for_each(Callback callback) { diff --git a/Kernel/Process.cpp b/Kernel/Process.cpp index 3bb727452e..a051e8145b 100644 --- a/Kernel/Process.cpp +++ b/Kernel/Process.cpp @@ -5308,4 +5308,15 @@ int Process::sys$recvfd(int sockfd) m_fds[new_fd].set(*received_descriptor_or_error.value(), 0); return new_fd; } + +long Process::sys$sysconf(int name) +{ + switch (name) { + case _SC_NPROCESSORS_CONF: + case _SC_NPROCESSORS_ONLN: + return Processor::processor_count(); + default: + return -EINVAL; + } +} } diff --git a/Kernel/Process.h b/Kernel/Process.h index 48d386c6aa..ebec0c73ea 100644 --- a/Kernel/Process.h +++ b/Kernel/Process.h @@ -327,6 +327,7 @@ public: int sys$ptrace(const Syscall::SC_ptrace_params*); int sys$sendfd(int sockfd, int fd); int sys$recvfd(int sockfd); + long sys$sysconf(int name); template<bool sockname, typename Params> int get_sock_or_peer_name(const Params&); diff --git a/Kernel/UnixTypes.h b/Kernel/UnixTypes.h index a07ebf4f57..9115c22daa 100644 --- a/Kernel/UnixTypes.h +++ b/Kernel/UnixTypes.h @@ -55,6 +55,11 @@ #define MS_RDONLY (1 << 4) #define MS_REMOUNT (1 << 5) +enum { + _SC_NPROCESSORS_CONF, + _SC_NPROCESSORS_ONLN, +}; + #define PERF_EVENT_MALLOC 1 #define PERF_EVENT_FREE 2 |