public static void sched_setaffinity(final BitSet affinity) {
final CLibrary lib = CLibrary.INSTANCE;
final cpu_set_t cpuset = new cpu_set_t();
final int size =
version.isSameOrNewer(VERSION_2_6) ? cpu_set_t.SIZE_OF_CPU_SET_T : NativeLong.SIZE;
final long[] bits = affinity.toLongArray();
for (int i = 0; i < bits.length; i++) {
if (Platform.is64Bit()) {
cpuset.__bits[i].setValue(bits[i]);
} else {
cpuset.__bits[i * 2].setValue(bits[i] & 0xFFFFFFFFL);
cpuset.__bits[i * 2 + 1].setValue((bits[i] >>> 32) & 0xFFFFFFFFL);
}
}
try {
if (lib.sched_setaffinity(0, size, cpuset) != 0) {
throw new IllegalStateException(
"sched_setaffinity(0, "
+ size
+ ", 0x"
+ Utilities.toHexString(affinity)
+ ") failed; errno="
+ Native.getLastError());
}
} catch (LastErrorException e) {
throw new IllegalStateException(
"sched_setaffinity(0, "
+ size
+ ", 0x"
+ Utilities.toHexString(affinity)
+ ") failed; errno="
+ e.getErrorCode(),
e);
}
}
public static int syscall(int number, Object... args) {
final CLibrary lib = CLibrary.INSTANCE;
try {
final int ret = lib.syscall(number, args);
if (ret < 0) {
throw new IllegalStateException("sched_getcpu() failed; errno=" + Native.getLastError());
}
return ret;
} catch (LastErrorException e) {
throw new IllegalStateException("sched_getcpu() failed; errno=" + e.getErrorCode(), e);
}
}
public static int getpid() {
final CLibrary lib = CLibrary.INSTANCE;
try {
final int ret = lib.getpid();
if (ret < 0) {
throw new IllegalStateException("getpid() failed; errno=" + Native.getLastError());
}
return ret;
} catch (LastErrorException e) {
throw new IllegalStateException("getpid() failed; errno=" + e.getErrorCode(), e);
}
}
public static @NotNull cpu_set_t sched_getaffinity() {
final CLibrary lib = CLibrary.INSTANCE;
final cpu_set_t cpuset = new cpu_set_t();
final int size =
version.isSameOrNewer(VERSION_2_6) ? cpu_set_t.SIZE_OF_CPU_SET_T : NativeLong.SIZE;
try {
if (lib.sched_getaffinity(0, size, cpuset) != 0) {
throw new IllegalStateException(
"sched_getaffinity(0, " + size + ", cpuset) failed; errno=" + Native.getLastError());
}
} catch (LastErrorException e) {
throw new IllegalStateException(
"sched_getaffinity(0, (" + size + ") , cpuset) failed; errno=" + e.getErrorCode(), e);
}
return cpuset;
}
public static int sched_getcpu() {
final CLibrary lib = CLibrary.INSTANCE;
try {
final int ret = lib.sched_getcpu();
if (ret < 0) {
throw new IllegalStateException("sched_getcpu() failed; errno=" + Native.getLastError());
}
return ret;
} catch (LastErrorException e) {
throw new IllegalStateException("sched_getcpu() failed; errno=" + e.getErrorCode(), e);
} catch (UnsatisfiedLinkError ule) {
try {
final IntByReference cpu = new IntByReference();
final IntByReference node = new IntByReference();
final int ret = lib.syscall(318, cpu, node, null);
if (ret != 0) {
throw new IllegalStateException("getcpu() failed; errno=" + Native.getLastError());
}
return cpu.getValue();
} catch (LastErrorException lee) {
if (lee.getErrorCode() == 38 && Platform.is64Bit()) { // unknown call
final Pointer getcpuAddr = new Pointer((-10L << 20) + 1024L * 2L);
final Function getcpu = Function.getFunction(getcpuAddr, Function.C_CONVENTION);
final IntByReference cpu = new IntByReference();
if (getcpu.invokeInt(new Object[] {cpu, null, null}) < 0) {
throw new IllegalStateException("getcpu() failed; errno=" + Native.getLastError());
} else {
return cpu.getValue();
}
} else {
throw new IllegalStateException("getcpu() failed; errno=" + lee.getErrorCode(), lee);
}
}
}
}