Add getloadavg(3).
Lets us build ninja with bionic.
Bug: N/A
Test: ran tests
Change-Id: I97eef1247d794b58a2b9aee4851551632e5a4e48
diff --git a/libc/Android.bp b/libc/Android.bp
index 1fc3062..681394f 100644
--- a/libc/Android.bp
+++ b/libc/Android.bp
@@ -1314,6 +1314,7 @@
"bionic/getdomainname.cpp",
"bionic/getentropy.cpp",
"bionic/gethostname.cpp",
+ "bionic/getloadavg.cpp",
"bionic/getpagesize.cpp",
"bionic/getpgrp.cpp",
"bionic/getpid.cpp",
diff --git a/libc/bionic/getloadavg.cpp b/libc/bionic/getloadavg.cpp
new file mode 100644
index 0000000..28d316c
--- /dev/null
+++ b/libc/bionic/getloadavg.cpp
@@ -0,0 +1,44 @@
+/*
+ * Copyright (C) 2018 The Android Open Source Project
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
+ * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <stdlib.h>
+
+#include <sys/sysinfo.h>
+
+int getloadavg(double averages[], int n) {
+ if (n < 0) return -1;
+ if (n > 3) n = 3;
+
+ struct sysinfo si;
+ if (sysinfo(&si) == -1) return -1;
+
+ for (int i = 0; i < n; ++i) {
+ averages[i] = static_cast<double>(si.loads[i]) / static_cast<double>(1 << SI_LOAD_SHIFT);
+ }
+ return n;
+}
diff --git a/libc/include/stdlib.h b/libc/include/stdlib.h
index 6888e8c..96a77a7 100644
--- a/libc/include/stdlib.h
+++ b/libc/include/stdlib.h
@@ -147,6 +147,15 @@
lldiv_t lldiv(long long __numerator, long long __denominator) __attribute_const__;
+/**
+ * [getloadavg(3)](http://man7.org/linux/man-pages/man3/getloadavg.3.html) queries the
+ * number of runnable processes averaged over time. The Linux kernel supports averages
+ * over the last 1, 5, and 15 minutes.
+ *
+ * Returns the number of samples written to `__averages` (at most 3), and returns -1 on failure.
+ */
+int getloadavg(double __averages[], int __n) __INTRODUCED_IN_FUTURE;
+
/* BSD compatibility. */
const char* getprogname(void) __INTRODUCED_IN(21);
void setprogname(const char* __name) __INTRODUCED_IN(21);
diff --git a/libc/libc.arm.map b/libc/libc.arm.map
index a22a8df..bd39d42 100644
--- a/libc/libc.arm.map
+++ b/libc/libc.arm.map
@@ -1432,6 +1432,7 @@
android_fdsan_get_error_level;
android_fdsan_set_error_level;
android_get_device_api_level;
+ getloadavg;
pthread_sigqueue;
reallocarray;
timespec_get;
diff --git a/libc/libc.arm64.map b/libc/libc.arm64.map
index 55fd587..81ff00d 100644
--- a/libc/libc.arm64.map
+++ b/libc/libc.arm64.map
@@ -1353,6 +1353,7 @@
android_fdsan_get_error_level;
android_fdsan_set_error_level;
android_get_device_api_level;
+ getloadavg;
pthread_sigqueue;
reallocarray;
timespec_get;
diff --git a/libc/libc.map.txt b/libc/libc.map.txt
index 304dbb7..934ad1f 100644
--- a/libc/libc.map.txt
+++ b/libc/libc.map.txt
@@ -1457,6 +1457,7 @@
android_fdsan_get_error_level;
android_fdsan_set_error_level;
android_get_device_api_level;
+ getloadavg;
pthread_sigqueue;
reallocarray;
timespec_get;
diff --git a/libc/libc.mips.map b/libc/libc.mips.map
index 397ff72..dc184a6 100644
--- a/libc/libc.mips.map
+++ b/libc/libc.mips.map
@@ -1416,6 +1416,7 @@
android_fdsan_get_error_level;
android_fdsan_set_error_level;
android_get_device_api_level;
+ getloadavg;
pthread_sigqueue;
reallocarray;
timespec_get;
diff --git a/libc/libc.mips64.map b/libc/libc.mips64.map
index 55fd587..81ff00d 100644
--- a/libc/libc.mips64.map
+++ b/libc/libc.mips64.map
@@ -1353,6 +1353,7 @@
android_fdsan_get_error_level;
android_fdsan_set_error_level;
android_get_device_api_level;
+ getloadavg;
pthread_sigqueue;
reallocarray;
timespec_get;
diff --git a/libc/libc.x86.map b/libc/libc.x86.map
index a18657c..f360dbf 100644
--- a/libc/libc.x86.map
+++ b/libc/libc.x86.map
@@ -1414,6 +1414,7 @@
android_fdsan_get_error_level;
android_fdsan_set_error_level;
android_get_device_api_level;
+ getloadavg;
pthread_sigqueue;
reallocarray;
timespec_get;
diff --git a/libc/libc.x86_64.map b/libc/libc.x86_64.map
index 55fd587..81ff00d 100644
--- a/libc/libc.x86_64.map
+++ b/libc/libc.x86_64.map
@@ -1353,6 +1353,7 @@
android_fdsan_get_error_level;
android_fdsan_set_error_level;
android_get_device_api_level;
+ getloadavg;
pthread_sigqueue;
reallocarray;
timespec_get;