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/* Phase -- wrapped ppaml_phase_t
* Copyright (C) 2014 Galois, Inc.
*
* This library is free software: you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the Free
* Software Foundation, either version 3 of the License, or (at your option)
* any later version.
*
* This library is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along with
* this library. If not, see <http://www.gnu.org/licenses/>.
*
* To contact Galois, complete the Web form at
* <http://corp.galois.com/contact/> or write to Galois, Inc., 421 Southwest
* 6th Avenue, Suite 300, Portland, Oregon, 97204-1622. */
package com.galois.ppaml.tracer;
/**
* A phase of execution to trace. This class exports no public constructors;
* to instantiate it, use <code>Tracer.createPhase</code>.
*/
public final class Phase extends CWrapper {
/**
* The <code>Tracer</code> this phase is associated with.
*/
private final Tracer tracer;
/**
* The name of the phase.
*/
private final String name;
/**
* Creates and initializes a <code>Phase</code>. You should not call this;
* call {@link Tracer.createPhase} instead.
*
* @param tracer the {@link Tracer} to associate the <code>Phase</code>
* with.
*
* @param name the name of the phase.
*/
protected Phase(Tracer tracer, final String name) {
this.tracer = tracer;
this.name = name;
super.open();
}
////////////////////////// Low-level life cycle //////////////////////////
///// JNI shared library /////
static {
System.loadLibrary("ppamltracer_java");
}
/**
* Wraps <code>malloc</code> to allocate a <code>ppaml_phase_t</code>.
*
* @return Same as <code>malloc</code>.
*/
private static native long mallocPhase();
/**
* Wraps <code>ppaml_phase_init</code>.
*
* @return -1 if converting <code>name</code> from a <code>String</code> to
* a <code>char *</code> failed; all other return codes are the same as
* <code>ppaml_phase_init</code>.
*/
private static native int ppaml_phase_init(
long tracer,
long phase,
final String reportNameBase);
/**
* Wraps <code>ppaml_phase_done</code>.
*
* @return Same as <code>ppaml_phase_done</code>.
*/
private static native int ppaml_phase_done(long phase);
/**
* Wraps <code>free</code>.
*/
private static native void freePhase(long phase);
///// JNI adapter code /////
@Override
protected void allocateCPointer() {
this.cPointer = mallocPhase();
}
/**
* Installs data into the structure to make it ready for use.
*
* <p> <b>Precondition:</b> Initialization succeeded.
*
* @throws OutOfMemoryError converting <code>name</code> from a
* <code>String</code> to a <code>char *</code> failed.
*
* @throws OTFWriterPhaseDefinitionException defining the OTF phase failed.
*/
@Override
protected void initializeCPointer() {
assert this.cPointer != 0;
assert tracer != null;
assert name != null;
final int r = ppaml_phase_init(tracer.cPointer, this.cPointer, name);
switch (r) {
case 0:
break;
case -1:
throw new java.lang.OutOfMemoryError(
"failed to convert Java string to C string");
case 1:
throw new OTFWriterPhaseDefinitionException();
default:
throw new UnexpectedReturnValueError(r);
}
}
@Override
protected void finalizeCPointer() {
assert this.cPointer != 0;
final int r = ppaml_phase_done(this.cPointer);
if (r != 0) {
throw new UnexpectedReturnValueError(r);
}
}
@Override
protected void freeCPointer() {
assert this.cPointer != 0;
freePhase(this.cPointer);
}
////////////////////////// Starting and stopping //////////////////////////
///// JNI shared library /////
/**
* Wraps <code>ppaml_phase_start</code>.
*
* @return Same as <code>ppaml_phase_start</code>.
*/
private static native int ppaml_phase_start(long phase);
/**
* Wraps <code>ppaml_phase_stop</code>.
*
* @return Same as <code>ppaml_phase_stop</code>.
*/
private static native int ppaml_phase_stop(long phase);
///// JNI adapter code /////
/**
* Records the start of a <code>Phase</code>.
*
* @throws ClosedException the <code>Phase</code> has been closed.
*
* @throws ClockAcquisitionException getting the time failed.
*
* @throws OTFWriterEntryException recording the phase start failed.
*/
public void start() {
if (this.cPointer == 0) {
throw new ClosedException();
}
final int r = ppaml_phase_start(this.cPointer);
switch (r) {
case 0:
break;
case 1:
throw new ClockAcquisitionException();
case 2:
throw new OTFWriterEntryException();
default:
throw new UnexpectedReturnValueError(r);
}
}
/**
* Records the end of a <code>Phase</code>.
*
* @throws ClosedException the <code>Phase</code> has been closed.
*
* @throws ClockAcquisitionException getting the time failed.
*
* @throws OTFWriterExitException recording the phase stop failed.
*/
public void stop() {
if (this.cPointer == 0) {
throw new ClosedException();
}
final int r = ppaml_phase_stop(this.cPointer);
switch (r) {
case 0:
break;
case 1:
throw new ClockAcquisitionException();
case 2:
throw new OTFWriterExitException();
default:
throw new UnexpectedReturnValueError(r);
}
}
}
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