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8243491: Implementation of Foreign-Memory Access API (Second Incubator)

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Upstream latest changes of the Foreign-Memory Access API

Co-authored-by: Jorn Vernee <jorn.vernee@oracle.com>
Co-authored-by: Mandy Chung <mandy.chung@oracle.com>
Co-authored-by: Paul Sandoz <paul.sandoz@oracle.com>
Co-authored-by: Peter Levart <peter.levart@gmail.com>
Reviewed-by: chegar, psandoz
This commit is contained in:
Chris Hegarty 2020-05-25 10:54:39 +01:00 • committed by Maurizio Cimadamore
parent 9b94b9d1a1
commit f3eb44a94d
94 changed files with 7496 additions and 1388 deletions
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18
src/java.base/unix/native/libnio/MappedByteBuffer.c → src/java.base/unix/native/libnio/MappedMemoryUtils.c
View file

@ -27,7 +27,7 @@
#include "jni_util.h"
#include "jvm.h"
#include "jlong.h"
#include "java_nio_MappedByteBuffer.h"
#include "java_nio_MappedMemoryUtils.h"
#include <assert.h>
#include <sys/mman.h>
#include <stddef.h>
@ -55,7 +55,7 @@ static long calculate_number_of_pages_in_range(void* address, size_t len, size_t
#endif
JNIEXPORT jboolean JNICALL
Java_java_nio_MappedByteBuffer_isLoaded0(JNIEnv *env, jobject obj, jlong address,
Java_java_nio_MappedMemoryUtils_isLoaded0(JNIEnv *env, jobject obj, jlong address,
jlong len, jint numPages)
{
jboolean loaded = JNI_TRUE;
@ -104,7 +104,7 @@ Java_java_nio_MappedByteBuffer_isLoaded0(JNIEnv *env, jobject obj, jlong address
JNIEXPORT void JNICALL
Java_java_nio_MappedByteBuffer_load0(JNIEnv *env, jobject obj, jlong address,
Java_java_nio_MappedMemoryUtils_load0(JNIEnv *env, jobject obj, jlong address,
jlong len)
{
char *a = (char *)jlong_to_ptr(address);
@ -114,9 +114,19 @@ Java_java_nio_MappedByteBuffer_load0(JNIEnv *env, jobject obj, jlong address,
}
}
JNIEXPORT void JNICALL
Java_java_nio_MappedMemoryUtils_unload0(JNIEnv *env, jobject obj, jlong address,
jlong len)
{
char *a = (char *)jlong_to_ptr(address);
int result = madvise((caddr_t)a, (size_t)len, MADV_DONTNEED);
if (result == -1) {
JNU_ThrowIOExceptionWithLastError(env, "madvise failed");
}
}
JNIEXPORT void JNICALL
Java_java_nio_MappedByteBuffer_force0(JNIEnv *env, jobject obj, jobject fdo,
Java_java_nio_MappedMemoryUtils_force0(JNIEnv *env, jobject obj, jobject fdo,
jlong address, jlong len)
{
void* a = (void *)jlong_to_ptr(address);