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HADOOP-9759. Add support for NativeCodeLoader#getLibraryName on Windows. Contributed by Chuan Liu. 

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1506325 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Chris Nauroth 2013-07-23 22:06:47 +00:00
parent a42e459b9e
commit 77fa04457c
2 changed files with 35 additions and 0 deletions
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3
hadoop-common-project/hadoop-common/CHANGES.txt
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@ -635,6 +635,9 @@ Release 2.1.0-beta - 2013-07-02
HADOOP-9738. TestDistCh fails. (jing9 via kihwal)
HADOOP-9759. Add support for NativeCodeLoader#getLibraryName on Windows.
(Chuan Liu via cnauroth)
BREAKDOWN OF HADOOP-8562 SUBTASKS AND RELATED JIRAS
HADOOP-8924. Hadoop Common creating package-info.java must not depend on

32
hadoop-common-project/hadoop-common/src/main/native/src/org/apache/hadoop/util/NativeCodeLoader.c
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@ -38,9 +38,41 @@ JNIEXPORT jboolean JNICALL Java_org_apache_hadoop_util_NativeCodeLoader_buildSup
JNIEXPORT jstring JNICALL Java_org_apache_hadoop_util_NativeCodeLoader_getLibraryName
(JNIEnv *env, jclass clazz)
{
#ifdef UNIX
Dl_info dl_info;
int ret = dladdr(
Java_org_apache_hadoop_util_NativeCodeLoader_getLibraryName,
&dl_info);
return (*env)->NewStringUTF(env, ret==0 ? "Unavailable" : dl_info.dli_fname);
#endif
#ifdef WINDOWS
SIZE_T ret = 0;
DWORD size = MAX_PATH;
LPWSTR filename = NULL;
HMODULE mod = NULL;
DWORD err = ERROR_SUCCESS;
MEMORY_BASIC_INFORMATION mbi;
ret = VirtualQuery(Java_org_apache_hadoop_util_NativeCodeLoader_getLibraryName,
&mbi, sizeof(mbi));
if (ret == 0) goto cleanup;
mod = mbi.AllocationBase;
do {
filename = (LPWSTR) realloc(filename, size * sizeof(WCHAR));
if (filename == NULL) goto cleanup;
GetModuleFileName(mod, filename, size);
size <<= 1;
err = GetLastError();
} while (err == ERROR_INSUFFICIENT_BUFFER);
if (err != ERROR_SUCCESS) goto cleanup;
return (*env)->NewString(env, filename, (jsize) wcslen(filename));
cleanup:
if (filename != NULL) free(filename);
return (*env)->NewStringUTF(env, "Unavailable");
#endif
}