Fri, 03 Feb 2012 18:04:11 -0800
Added tag hs23-b13 for changeset b22de8247499
aoqi@0 | 1 | #include <assert.h> |
aoqi@0 | 2 | #include <jni.h> |
aoqi@0 | 3 | #include <alloca.h> |
aoqi@0 | 4 | |
aoqi@0 | 5 | #include <pthread.h> |
aoqi@0 | 6 | |
aoqi@0 | 7 | union env_union |
aoqi@0 | 8 | { |
aoqi@0 | 9 | void *void_env; |
aoqi@0 | 10 | JNIEnv *jni_env; |
aoqi@0 | 11 | }; |
aoqi@0 | 12 | |
aoqi@0 | 13 | union env_union tmp; |
aoqi@0 | 14 | JNIEnv* env; |
aoqi@0 | 15 | JavaVM* jvm; |
aoqi@0 | 16 | JavaVMInitArgs vm_args; |
aoqi@0 | 17 | JavaVMOption options[1]; |
aoqi@0 | 18 | jclass class_id; |
aoqi@0 | 19 | jmethodID method_id; |
aoqi@0 | 20 | jint result; |
aoqi@0 | 21 | |
aoqi@0 | 22 | long product(unsigned long n, unsigned long m) { |
aoqi@0 | 23 | if (m == 1) { |
aoqi@0 | 24 | return n; |
aoqi@0 | 25 | } else { |
aoqi@0 | 26 | int *p = alloca(sizeof (int)); |
aoqi@0 | 27 | *p = n; |
aoqi@0 | 28 | return product (n, m-1) + *p; |
aoqi@0 | 29 | } |
aoqi@0 | 30 | } |
aoqi@0 | 31 | |
aoqi@0 | 32 | void * |
aoqi@0 | 33 | floobydust (void *p) |
aoqi@0 | 34 | { |
aoqi@0 | 35 | (*jvm)->AttachCurrentThread(jvm, &tmp.void_env, NULL); |
aoqi@0 | 36 | env = tmp.jni_env; |
aoqi@0 | 37 | |
aoqi@0 | 38 | class_id = (*env)->FindClass (env, "T"); |
aoqi@0 | 39 | assert (class_id); |
aoqi@0 | 40 | |
aoqi@0 | 41 | method_id = (*env)->GetStaticMethodID (env, class_id, "printIt", "()V"); |
aoqi@0 | 42 | assert (method_id); |
aoqi@0 | 43 | |
aoqi@0 | 44 | (*env)->CallStaticVoidMethod (env, class_id, method_id, NULL); |
aoqi@0 | 45 | |
aoqi@0 | 46 | (*jvm)->DetachCurrentThread(jvm); |
aoqi@0 | 47 | |
aoqi@0 | 48 | printf("%ld\n", product(5000,5000)); |
aoqi@0 | 49 | |
aoqi@0 | 50 | (*jvm)->AttachCurrentThread(jvm, &tmp.void_env, NULL); |
aoqi@0 | 51 | env = tmp.jni_env; |
aoqi@0 | 52 | |
aoqi@0 | 53 | class_id = (*env)->FindClass (env, "T"); |
aoqi@0 | 54 | assert (class_id); |
aoqi@0 | 55 | |
aoqi@0 | 56 | method_id = (*env)->GetStaticMethodID (env, class_id, "printIt", "()V"); |
aoqi@0 | 57 | assert (method_id); |
aoqi@0 | 58 | |
aoqi@0 | 59 | (*env)->CallStaticVoidMethod (env, class_id, method_id, NULL); |
aoqi@0 | 60 | |
aoqi@0 | 61 | (*jvm)->DetachCurrentThread(jvm); |
aoqi@0 | 62 | |
aoqi@0 | 63 | printf("%ld\n", product(5000,5000)); |
aoqi@0 | 64 | |
aoqi@0 | 65 | return NULL; |
aoqi@0 | 66 | } |
aoqi@0 | 67 | |
aoqi@0 | 68 | int |
aoqi@0 | 69 | main (int argc, const char** argv) |
aoqi@0 | 70 | { |
aoqi@0 | 71 | options[0].optionString = "-Xss320k"; |
aoqi@0 | 72 | |
aoqi@0 | 73 | vm_args.version = JNI_VERSION_1_2; |
aoqi@0 | 74 | vm_args.ignoreUnrecognized = JNI_TRUE; |
aoqi@0 | 75 | vm_args.options = options; |
aoqi@0 | 76 | vm_args.nOptions = 1; |
aoqi@0 | 77 | |
aoqi@0 | 78 | result = JNI_CreateJavaVM (&jvm, &tmp.void_env, &vm_args); |
aoqi@0 | 79 | assert (result >= 0); |
aoqi@0 | 80 | |
aoqi@0 | 81 | env = tmp.jni_env; |
aoqi@0 | 82 | |
aoqi@0 | 83 | floobydust (NULL); |
aoqi@0 | 84 | |
aoqi@0 | 85 | pthread_t thr; |
aoqi@0 | 86 | pthread_create (&thr, NULL, floobydust, NULL); |
aoqi@0 | 87 | pthread_join (thr, NULL); |
aoqi@0 | 88 | |
aoqi@0 | 89 | return 0; |
aoqi@0 | 90 | } |