From mboxrd@z Thu Jan 1 00:00:00 1970 X-Msuck: nntp://news.gmane.org/gmane.linux.lib.musl.general/9402 Path: news.gmane.org!not-for-mail From: Nathan Zadoks Newsgroups: gmane.linux.lib.musl.general Subject: [PATCH] add sched_getcpu Date: Mon, 29 Feb 2016 17:57:08 +0100 Message-ID: <1456765028-23958-2-git-send-email-nathan@nathan7.eu> References: <1456764572-18648-1-git-send-email-nathan@nathan7.eu> <1456765028-23958-1-git-send-email-nathan@nathan7.eu> Reply-To: musl@lists.openwall.com NNTP-Posting-Host: plane.gmane.org X-Trace: ger.gmane.org 1456765064 31574 80.91.229.3 (29 Feb 2016 16:57:44 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Mon, 29 Feb 2016 16:57:44 +0000 (UTC) Cc: Nathan Zadoks To: musl@lists.openwall.com Original-X-From: musl-return-9415-gllmg-musl=m.gmane.org@lists.openwall.com Mon Feb 29 17:57:37 2016 Return-path: Envelope-to: gllmg-musl@m.gmane.org Original-Received: from mother.openwall.net ([195.42.179.200]) by plane.gmane.org with smtp (Exim 4.69) (envelope-from ) id 1aaR8Z-0006Xt-Jj for gllmg-musl@m.gmane.org; Mon, 29 Feb 2016 17:57:35 +0100 Original-Received: (qmail 27832 invoked by uid 550); 29 Feb 2016 16:57:33 -0000 Mailing-List: contact musl-help@lists.openwall.com; run by ezmlm Precedence: bulk List-Post: List-Help: List-Unsubscribe: List-Subscribe: List-ID: Original-Received: (qmail 27733 invoked from network); 29 Feb 2016 16:57:28 -0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=nathan7.eu; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=kZxnz1/FAbUTg9qiMrFNQuOhtj8wIDDgLheET+58Jmk=; b=Pbsif0VmmjCUkYWxjhSdD2Wrs/L9PmA1UtDgOC8NBd118xHuDqCJDPPClJ+5Tkdbmy pL+w3Io3lJIZsnP5YCaiD6ina5H2nX4M92xwqOOQePHeVTaIjbJTQHYTVGePGaoKXqSn dV9HRTW2Ne8ZNBo50y+zKv0pi7OtqIfbGiA54= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=kZxnz1/FAbUTg9qiMrFNQuOhtj8wIDDgLheET+58Jmk=; b=IEysw2euQ7d2hJlLr5cNhvzBM0yypJzXRqKrGAMODNcS5lmiUMZAq23qDp20TrZjnq XTG+2u2Kg7cL5AVNpbjGBmnh2F2OsGWSij+A4berUXVlO9ZgLTzzqyxHENxTEp7iHIdL 57LEvMY5HR+IRzxFuxlZq88E/6Wt6spsh1hVA7II3uykxD4V8fhq/XXZeX9gQDOq3iFj PXM93pCNXXmDLaG3t8IiKP+Mz5ylJKCoy4mcRDhC2REnt2A4TqEyN+wBs0e62K22h1rb T/sQA1BdJl5d3JahEVZu8vDg2IlJsgBmPNFYuGGe0T0tOTijE/La0IX+Zh1dESS1Csgp uLEg== X-Gm-Message-State: AD7BkJJxQvmln+cGwQ0aBPmP0IKHKeZgCDKO0o9Upg8bDcoINgNeILsTZV0+mLJSHXCAaA== X-Received: by 10.28.226.212 with SMTP id z203mr12908919wmg.78.1456765037336; Mon, 29 Feb 2016 08:57:17 -0800 (PST) X-Mailer: git-send-email 2.7.1 In-Reply-To: <1456765028-23958-1-git-send-email-nathan@nathan7.eu> Xref: news.gmane.org gmane.linux.lib.musl.general:9402 Archived-At: This is a GNU extension, but a fairly minor one, for a system call that otherwise has no libc wrapper. Adding it was discussed previously, without any objections: http://www.openwall.com/lists/musl/2015/05/08/24 --- include/sched.h | 3 +++ src/sched/sched_getcpu.c | 10 ++++++++++ 2 files changed, 13 insertions(+) create mode 100644 src/sched/sched_getcpu.c diff --git a/include/sched.h b/include/sched.h index 3e34a72..17f5e06 100644 --- a/include/sched.h +++ b/include/sched.h @@ -76,6 +76,9 @@ void free(void *); typedef struct cpu_set_t { unsigned long __bits[128/sizeof(long)]; } cpu_set_t; int __sched_cpucount(size_t, const cpu_set_t *); +#ifdef _GNU_SOURCE +int sched_getcpu(void); +#endif int sched_getaffinity(pid_t, size_t, cpu_set_t *); int sched_setaffinity(pid_t, size_t, const cpu_set_t *); diff --git a/src/sched/sched_getcpu.c b/src/sched/sched_getcpu.c new file mode 100644 index 0000000..070d6e7 --- /dev/null +++ b/src/sched/sched_getcpu.c @@ -0,0 +1,10 @@ +#define _GNU_SOURCE +#include +#include +#include "syscall.h" + +int sched_getcpu(void) { + int c, s; + s = syscall(SYS_getcpu, &c, NULL, NULL); + return (s == 0) ? c : s; +} -- 2.7.1