diff options
Diffstat (limited to 'bundles/org.eclipse.swt/Eclipse SWT/common/library/callback.c')
| -rwxr-xr-x | bundles/org.eclipse.swt/Eclipse SWT/common/library/callback.c | 753 |
1 files changed, 0 insertions, 753 deletions
diff --git a/bundles/org.eclipse.swt/Eclipse SWT/common/library/callback.c b/bundles/org.eclipse.swt/Eclipse SWT/common/library/callback.c deleted file mode 100755 index 25e66053d2..0000000000 --- a/bundles/org.eclipse.swt/Eclipse SWT/common/library/callback.c +++ /dev/null @@ -1,753 +0,0 @@ -/******************************************************************************* - * Copyright (c) 2000, 2009 IBM Corporation and others. - * All rights reserved. This program and the accompanying materials - * are made available under the terms of the Eclipse Public License v1.0 - * which accompanies this distribution, and is available at - * http://www.eclipse.org/legal/epl-v10.html - * - * Contributors: - * IBM Corporation - initial API and implementation - *******************************************************************************/ - -/** - * Callback implementation. - */ -#include "callback.h" -#include <string.h> - -/* define this to print out debug statements */ -/* #define DEBUG_CALL_PRINTS */ - -/* --------------- callback globals ----------------- */ - -static JavaVM *jvm = NULL; -static CALLBACK_DATA callbackData[MAX_CALLBACKS]; -static int callbackEnabled = 1; -static int callbackEntryCount = 0; -static int initialized = 0; -static jint JNI_VERSION = 0; - -#ifdef DEBUG_CALL_PRINTS -static int counter = 0; -#endif - -#ifdef ATOMIC -#include <libkern/OSAtomic.h> -#define ATOMIC_INC(value) OSAtomicIncrement32(&value); -#define ATOMIC_DEC(value) OSAtomicDecrement32(&value); -#else -#define ATOMIC_INC(value) value++; -#define ATOMIC_DEC(value) value--; -#endif - -jintLong callback(int index, ...); - -#ifdef USE_ASSEMBLER - -#if !(defined (_WIN32) || defined (_WIN32_WCE)) -#include <sys/mman.h> -#endif - -static unsigned char *callbackCode = NULL; -#define CALLBACK_THUNK_SIZE 64 - -#else - -/* --------------- callback functions --------------- */ - - -/* Function name from index and number of arguments */ -#define FN(index, args) fn##index##_##args - -/** - * Functions templates - * - * NOTE: If the maximum number of arguments changes (MAX_ARGS), the number - * of function templates has to change accordingly. - */ - -/* Function template with no arguments */ -#define FN_0(index) RETURN_TYPE FN(index, 0)() { return RETURN_CAST callback(index); } - -/* Function template with 1 argument */ -#define FN_1(index) RETURN_TYPE FN(index, 1)(jintLong p1) { return RETURN_CAST callback(index, p1); } - -/* Function template with 2 arguments */ -#define FN_2(index) RETURN_TYPE FN(index, 2)(jintLong p1, jintLong p2) { return RETURN_CAST callback(index, p1, p2); } - -/* Function template with 3 arguments */ -#define FN_3(index) RETURN_TYPE FN(index, 3)(jintLong p1, jintLong p2, jintLong p3) { return RETURN_CAST callback(index, p1, p2, p3); } - -/* Function template with 4 arguments */ -#define FN_4(index) RETURN_TYPE FN(index, 4)(jintLong p1, jintLong p2, jintLong p3, jintLong p4) { return RETURN_CAST callback(index, p1, p2, p3, p4); } - -/* Function template with 5 arguments */ -#define FN_5(index) RETURN_TYPE FN(index, 5)(jintLong p1, jintLong p2, jintLong p3, jintLong p4, jintLong p5) { return RETURN_CAST callback(index, p1, p2, p3, p4, p5); } - -/* Function template with 6 arguments */ -#define FN_6(index) RETURN_TYPE FN(index, 6)(jintLong p1, jintLong p2, jintLong p3, jintLong p4, jintLong p5, jintLong p6) { return RETURN_CAST callback(index, p1, p2, p3, p4, p5, p6); } - -/* Function template with 7 arguments */ -#define FN_7(index) RETURN_TYPE FN(index, 7)(jintLong p1, jintLong p2, jintLong p3, jintLong p4, jintLong p5, jintLong p6, jintLong p7) { return RETURN_CAST callback(index, p1, p2, p3, p4, p5, p6, p7); } - -/* Function template with 8 arguments */ -#define FN_8(index) RETURN_TYPE FN(index, 8)(jintLong p1, jintLong p2, jintLong p3, jintLong p4, jintLong p5, jintLong p6, jintLong p7, jintLong p8) { return RETURN_CAST callback(index, p1, p2, p3, p4, p5, p6, p7, p8); } - -/* Function template with 9 arguments */ -#define FN_9(index) RETURN_TYPE FN(index, 9)(jintLong p1, jintLong p2, jintLong p3, jintLong p4, jintLong p5, jintLong p6, jintLong p7, jintLong p8, jintLong p9) { return RETURN_CAST callback(index, p1, p2, p3, p4, p5, p6, p7, p8, p9); } - -/* Function template with 10 arguments */ -#define FN_10(index) RETURN_TYPE FN(index, 10) (jintLong p1, jintLong p2, jintLong p3, jintLong p4, jintLong p5, jintLong p6, jintLong p7, jintLong p8, jintLong p9, jintLong p10) { return RETURN_CAST callback(index, p1, p2, p3, p4, p5, p6, p7, p8, p9, p10); } - -/* Function template with 11 arguments */ -#define FN_11(index) RETURN_TYPE FN(index, 11) (jintLong p1, jintLong p2, jintLong p3, jintLong p4, jintLong p5, jintLong p6, jintLong p7, jintLong p8, jintLong p9, jintLong p10, jintLong p11) { return RETURN_CAST callback(index, p1, p2, p3, p4, p5, p6, p7, p8, p9, p10, p11); } - -/* Function template with 12 arguments */ -#define FN_12(index) RETURN_TYPE FN(index, 12) (jintLong p1, jintLong p2, jintLong p3, jintLong p4, jintLong p5, jintLong p6, jintLong p7, jintLong p8, jintLong p9, jintLong p10, jintLong p11, jintLong p12) { return RETURN_CAST callback(index, p1, p2, p3, p4, p5, p6, p7, p8, p9, p10, p11, p12); } - -/** - * Define all functions with the specified number of arguments. - * - * NOTE: If the maximum number of callbacks changes (MAX_CALLBACKS), - * this macro has to be updated. - */ -#if MAX_CALLBACKS == 16 -#define FN_BLOCK(args) \ - FN_##args(0) \ - FN_##args(1) \ - FN_##args(2) \ - FN_##args(3) \ - FN_##args(4) \ - FN_##args(5) \ - FN_##args(6) \ - FN_##args(7) \ - FN_##args(8) \ - FN_##args(9) \ - FN_##args(10) \ - FN_##args(11) \ - FN_##args(12) \ - FN_##args(13) \ - FN_##args(14) \ - FN_##args(15) -#elif MAX_CALLBACKS == 128 -#define FN_BLOCK(args) \ - FN_##args(0) \ - FN_##args(1) \ - FN_##args(2) \ - FN_##args(3) \ - FN_##args(4) \ - FN_##args(5) \ - FN_##args(6) \ - FN_##args(7) \ - FN_##args(8) \ - FN_##args(9) \ - FN_##args(10) \ - FN_##args(11) \ - FN_##args(12) \ - FN_##args(13) \ - FN_##args(14) \ - FN_##args(15) \ - FN_##args(16) \ - FN_##args(17) \ - FN_##args(18) \ - FN_##args(19) \ - FN_##args(20) \ - FN_##args(21) \ - FN_##args(22) \ - FN_##args(23) \ - FN_##args(24) \ - FN_##args(25) \ - FN_##args(26) \ - FN_##args(27) \ - FN_##args(28) \ - FN_##args(29) \ - FN_##args(30) \ - FN_##args(31) \ - FN_##args(32) \ - FN_##args(33) \ - FN_##args(34) \ - FN_##args(35) \ - FN_##args(36) \ - FN_##args(37) \ - FN_##args(38) \ - FN_##args(39) \ - FN_##args(40) \ - FN_##args(41) \ - FN_##args(42) \ - FN_##args(43) \ - FN_##args(44) \ - FN_##args(45) \ - FN_##args(46) \ - FN_##args(47) \ - FN_##args(48) \ - FN_##args(49) \ - FN_##args(50) \ - FN_##args(51) \ - FN_##args(52) \ - FN_##args(53) \ - FN_##args(54) \ - FN_##args(55) \ - FN_##args(56) \ - FN_##args(57) \ - FN_##args(58) \ - FN_##args(59) \ - FN_##args(60) \ - FN_##args(61) \ - FN_##args(62) \ - FN_##args(63) \ - FN_##args(64) \ - FN_##args(65) \ - FN_##args(66) \ - FN_##args(67) \ - FN_##args(68) \ - FN_##args(69) \ - FN_##args(70) \ - FN_##args(71) \ - FN_##args(72) \ - FN_##args(73) \ - FN_##args(74) \ - FN_##args(75) \ - FN_##args(76) \ - FN_##args(77) \ - FN_##args(78) \ - FN_##args(79) \ - FN_##args(80) \ - FN_##args(81) \ - FN_##args(82) \ - FN_##args(83) \ - FN_##args(84) \ - FN_##args(85) \ - FN_##args(86) \ - FN_##args(87) \ - FN_##args(88) \ - FN_##args(89) \ - FN_##args(90) \ - FN_##args(91) \ - FN_##args(92) \ - FN_##args(93) \ - FN_##args(94) \ - FN_##args(95) \ - FN_##args(96) \ - FN_##args(97) \ - FN_##args(98) \ - FN_##args(99) \ - FN_##args(100) \ - FN_##args(101) \ - FN_##args(102) \ - FN_##args(103) \ - FN_##args(104) \ - FN_##args(105) \ - FN_##args(106) \ - FN_##args(107) \ - FN_##args(108) \ - FN_##args(109) \ - FN_##args(110) \ - FN_##args(111) \ - FN_##args(112) \ - FN_##args(113) \ - FN_##args(114) \ - FN_##args(115) \ - FN_##args(116) \ - FN_##args(117) \ - FN_##args(118) \ - FN_##args(119) \ - FN_##args(120) \ - FN_##args(121) \ - FN_##args(122) \ - FN_##args(123) \ - FN_##args(124) \ - FN_##args(125) \ - FN_##args(126) \ - FN_##args(127) -#else -#error Invalid MAX_CALLBACKS -#endif /* MAX_CALLBACKS == 16 */ - -/** - * Define all callback functions. - * - * NOTE: If the maximum number of arguments changes (MAX_ARGS), the following - * has to change accordinglly. - */ -FN_BLOCK(0) -FN_BLOCK(1) -FN_BLOCK(2) -FN_BLOCK(3) -FN_BLOCK(4) -FN_BLOCK(5) -FN_BLOCK(6) -FN_BLOCK(7) -FN_BLOCK(8) -FN_BLOCK(9) -FN_BLOCK(10) -FN_BLOCK(11) -FN_BLOCK(12) - -/** - * Initialize the function pointers for the callback routines. - * - * NOTE: If MAX_ARGS or MAX_CALLBACKS changes, the following has to be updated. - */ -#if MAX_CALLBACKS == 16 -#define FN_A_BLOCK(args) { \ - (jintLong)FN(0, args), \ - (jintLong)FN(1, args), \ - (jintLong)FN(2, args), \ - (jintLong)FN(3, args), \ - (jintLong)FN(4, args), \ - (jintLong)FN(5, args), \ - (jintLong)FN(6, args), \ - (jintLong)FN(7, args), \ - (jintLong)FN(8, args), \ - (jintLong)FN(9, args), \ - (jintLong)FN(10, args), \ - (jintLong)FN(11, args), \ - (jintLong)FN(12, args), \ - (jintLong)FN(13, args), \ - (jintLong)FN(14, args), \ - (jintLong)FN(15, args), \ -}, -#elif MAX_CALLBACKS == 128 -#define FN_A_BLOCK(args) { \ - (jintLong)FN(0, args), \ - (jintLong)FN(1, args), \ - (jintLong)FN(2, args), \ - (jintLong)FN(3, args), \ - (jintLong)FN(4, args), \ - (jintLong)FN(5, args), \ - (jintLong)FN(6, args), \ - (jintLong)FN(7, args), \ - (jintLong)FN(8, args), \ - (jintLong)FN(9, args), \ - (jintLong)FN(10, args), \ - (jintLong)FN(11, args), \ - (jintLong)FN(12, args), \ - (jintLong)FN(13, args), \ - (jintLong)FN(14, args), \ - (jintLong)FN(15, args), \ - (jintLong)FN(16, args), \ - (jintLong)FN(17, args), \ - (jintLong)FN(18, args), \ - (jintLong)FN(19, args), \ - (jintLong)FN(20, args), \ - (jintLong)FN(21, args), \ - (jintLong)FN(22, args), \ - (jintLong)FN(23, args), \ - (jintLong)FN(24, args), \ - (jintLong)FN(25, args), \ - (jintLong)FN(26, args), \ - (jintLong)FN(27, args), \ - (jintLong)FN(28, args), \ - (jintLong)FN(29, args), \ - (jintLong)FN(30, args), \ - (jintLong)FN(31, args), \ - (jintLong)FN(32, args), \ - (jintLong)FN(33, args), \ - (jintLong)FN(34, args), \ - (jintLong)FN(35, args), \ - (jintLong)FN(36, args), \ - (jintLong)FN(37, args), \ - (jintLong)FN(38, args), \ - (jintLong)FN(39, args), \ - (jintLong)FN(40, args), \ - (jintLong)FN(41, args), \ - (jintLong)FN(42, args), \ - (jintLong)FN(43, args), \ - (jintLong)FN(44, args), \ - (jintLong)FN(45, args), \ - (jintLong)FN(46, args), \ - (jintLong)FN(47, args), \ - (jintLong)FN(48, args), \ - (jintLong)FN(49, args), \ - (jintLong)FN(50, args), \ - (jintLong)FN(51, args), \ - (jintLong)FN(52, args), \ - (jintLong)FN(53, args), \ - (jintLong)FN(54, args), \ - (jintLong)FN(55, args), \ - (jintLong)FN(56, args), \ - (jintLong)FN(57, args), \ - (jintLong)FN(58, args), \ - (jintLong)FN(59, args), \ - (jintLong)FN(60, args), \ - (jintLong)FN(61, args), \ - (jintLong)FN(62, args), \ - (jintLong)FN(63, args), \ - (jintLong)FN(64, args), \ - (jintLong)FN(65, args), \ - (jintLong)FN(66, args), \ - (jintLong)FN(67, args), \ - (jintLong)FN(68, args), \ - (jintLong)FN(69, args), \ - (jintLong)FN(70, args), \ - (jintLong)FN(71, args), \ - (jintLong)FN(72, args), \ - (jintLong)FN(73, args), \ - (jintLong)FN(74, args), \ - (jintLong)FN(75, args), \ - (jintLong)FN(76, args), \ - (jintLong)FN(77, args), \ - (jintLong)FN(78, args), \ - (jintLong)FN(79, args), \ - (jintLong)FN(80, args), \ - (jintLong)FN(81, args), \ - (jintLong)FN(82, args), \ - (jintLong)FN(83, args), \ - (jintLong)FN(84, args), \ - (jintLong)FN(85, args), \ - (jintLong)FN(86, args), \ - (jintLong)FN(87, args), \ - (jintLong)FN(88, args), \ - (jintLong)FN(89, args), \ - (jintLong)FN(90, args), \ - (jintLong)FN(91, args), \ - (jintLong)FN(92, args), \ - (jintLong)FN(93, args), \ - (jintLong)FN(94, args), \ - (jintLong)FN(95, args), \ - (jintLong)FN(96, args), \ - (jintLong)FN(97, args), \ - (jintLong)FN(98, args), \ - (jintLong)FN(99, args), \ - (jintLong)FN(100, args), \ - (jintLong)FN(101, args), \ - (jintLong)FN(102, args), \ - (jintLong)FN(103, args), \ - (jintLong)FN(104, args), \ - (jintLong)FN(105, args), \ - (jintLong)FN(106, args), \ - (jintLong)FN(107, args), \ - (jintLong)FN(108, args), \ - (jintLong)FN(109, args), \ - (jintLong)FN(110, args), \ - (jintLong)FN(111, args), \ - (jintLong)FN(112, args), \ - (jintLong)FN(113, args), \ - (jintLong)FN(114, args), \ - (jintLong)FN(115, args), \ - (jintLong)FN(116, args), \ - (jintLong)FN(117, args), \ - (jintLong)FN(118, args), \ - (jintLong)FN(119, args), \ - (jintLong)FN(120, args), \ - (jintLong)FN(121, args), \ - (jintLong)FN(122, args), \ - (jintLong)FN(123, args), \ - (jintLong)FN(124, args), \ - (jintLong)FN(125, args), \ - (jintLong)FN(126, args), \ - (jintLong)FN(127, args), \ -}, -#else -#error Invalid MAX_CALLBACKS -#endif /* MAX_CALLBACKS == 16 */ - -jintLong fnx_array[MAX_ARGS+1][MAX_CALLBACKS] = { - FN_A_BLOCK(0) - FN_A_BLOCK(1) - FN_A_BLOCK(2) - FN_A_BLOCK(3) - FN_A_BLOCK(4) - FN_A_BLOCK(5) - FN_A_BLOCK(6) - FN_A_BLOCK(7) - FN_A_BLOCK(8) - FN_A_BLOCK(9) - FN_A_BLOCK(10) - FN_A_BLOCK(11) - FN_A_BLOCK(12) -}; - -#endif /* USE_ASSEMBLER */ - -/* --------------- callback class calls --------------- */ - -JNIEXPORT jintLong JNICALL Java_org_eclipse_swt_internal_Callback_bind - (JNIEnv *env, jclass that, jobject callbackObject, jobject object, jstring method, jstring signature, jint argCount, jboolean isStatic, jboolean isArrayBased, jintLong errorResult) -{ - int i; - jmethodID mid = NULL; - jclass javaClass = that; - const char *methodString = NULL, *sigString = NULL; - if (jvm == NULL) (*env)->GetJavaVM(env, &jvm); - if (JNI_VERSION == 0) JNI_VERSION = (*env)->GetVersion(env); - if (!initialized) { - memset(&callbackData, 0, sizeof(callbackData)); - initialized = 1; - } - if (method) methodString = (const char *) (*env)->GetStringUTFChars(env, method, NULL); - if (signature) sigString = (const char *) (*env)->GetStringUTFChars(env, signature, NULL); - if (object && methodString && sigString) { - if (isStatic) { - mid = (*env)->GetStaticMethodID(env, object, methodString, sigString); - } else { - javaClass = (*env)->GetObjectClass(env, object); - mid = (*env)->GetMethodID(env, javaClass, methodString, sigString); - } - } - if (method && methodString) (*env)->ReleaseStringUTFChars(env, method, methodString); - if (signature && sigString) (*env)->ReleaseStringUTFChars(env, signature, sigString); - if (mid == 0) goto fail; - for (i=0; i<MAX_CALLBACKS; i++) { - if (!callbackData[i].callback) { - if ((callbackData[i].callback = (*env)->NewGlobalRef(env, callbackObject)) == NULL) goto fail; - if ((callbackData[i].object = (*env)->NewGlobalRef(env, object)) == NULL) goto fail; - callbackData[i].isStatic = isStatic; - callbackData[i].isArrayBased = isArrayBased; - callbackData[i].argCount = argCount; - callbackData[i].errorResult = errorResult; - callbackData[i].methodID = mid; -#ifndef USE_ASSEMBLER - return (jintLong) fnx_array[argCount][i]; -#else - { - int j = 0, k; - unsigned char* code; -#ifdef __APPLE__ - int pad = 0; -#endif - if (callbackCode == NULL) { -#if defined (_WIN32) || defined (_WIN32_WCE) - callbackCode = VirtualAlloc(NULL, CALLBACK_THUNK_SIZE * MAX_CALLBACKS, MEM_COMMIT, PAGE_EXECUTE_READWRITE); - if (callbackCode == NULL) return 0; -#else - callbackCode = mmap(NULL, CALLBACK_THUNK_SIZE * MAX_CALLBACKS, PROT_EXEC | PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANON, -1, 0); - if (callbackCode == MAP_FAILED) return 0; -#endif - } - code = (unsigned char *)(callbackCode + (i * CALLBACK_THUNK_SIZE)); - - //PUSH EBP - 1 byte - code[j++] = 0x55; - - //MOV EBP,ESP - 2 bytes - code[j++] = 0x8b; - code[j++] = 0xec; - -#ifdef __APPLE__ - /* darwin calling conventions require that the stack be aligned on a 16-byte boundary. */ - k = (argCount+3)*sizeof(jintLong); - pad = ((k + 15) & ~15) - k; - if (pad > 0) { - //SUB ESP,pad - 3 bytes - code[j++] = 0x83; - code[j++] = 0xec; - code[j++] = pad; - } -#endif - - // 3*argCount bytes - for (k=(argCount + 1) * sizeof(jintLong); k >= sizeof(jintLong)*2; k -= sizeof(jintLong)) { - //PUSH SS:[EBP+k] - code[j++] = 0xff; - code[j++] = 0x75; - code[j++] = k; - } - - if (i > 127) { - //PUSH i - 5 bytes - code[j++] = 0x68; - code[j++] = ((i >> 0) & 0xFF); - code[j++] = ((i >> 8) & 0xFF); - code[j++] = ((i >> 16) & 0xFF); - code[j++] = ((i >> 24) & 0xFF); - } else { - //PUSH i - 2 bytes - code[j++] = 0x6a; - code[j++] = i; - } - - //MOV EAX callback - 1 + sizeof(jintLong) bytes - code[j++] = 0xb8; - ((jintLong *)&code[j])[0] = (jintLong)&callback; - j += sizeof(jintLong); - - //CALL EAX - 2 bytes - code[j++] = 0xff; - code[j++] = 0xd0; - - //ADD ESP,(argCount + 1) * sizeof(jintLong) - 3 bytes - code[j++] = 0x83; - code[j++] = 0xc4; -#ifdef __APPLE__ - code[j++] = (unsigned char)(pad + ((argCount + 1) * sizeof(jintLong))); -#else - code[j++] = (unsigned char)((argCount + 1) * sizeof(jintLong)); -#endif - - //POP EBP - 1 byte - code[j++] = 0x5d; - -#if defined (_WIN32) || defined (_WIN32_WCE) - //RETN argCount * sizeof(jintLong) - 3 bytes - code[j++] = 0xc2; - code[j++] = (unsigned char)(argCount * sizeof(jintLong)); - code[j++] = 0x00; -#else - //RETN - 1 byte - code[j++] = 0xc3; -#endif - - if (j > CALLBACK_THUNK_SIZE) { - jclass errorClass = (*env)->FindClass(env, "java/lang/Error"); - (*env)->ThrowNew(env, errorClass, "Callback thunk overflow"); - } - - return (jintLong)code; - } -#endif /* USE_ASSEMBLER */ - } - } -fail: - return 0; -} - -JNIEXPORT void JNICALL Java_org_eclipse_swt_internal_Callback_unbind - (JNIEnv *env, jclass that, jobject callback) -{ - int i; - for (i=0; i<MAX_CALLBACKS; i++) { - if (callbackData[i].callback != NULL && (*env)->IsSameObject(env, callback, callbackData[i].callback)) { - if (callbackData[i].callback != NULL) (*env)->DeleteGlobalRef(env, callbackData[i].callback); - if (callbackData[i].object != NULL) (*env)->DeleteGlobalRef(env, callbackData[i].object); - memset(&callbackData[i], 0, sizeof(CALLBACK_DATA)); - } - } -} - -JNIEXPORT jboolean JNICALL Java_org_eclipse_swt_internal_Callback_getEnabled - (JNIEnv *env, jclass that) -{ - return (jboolean)callbackEnabled; -} - -JNIEXPORT jint JNICALL Java_org_eclipse_swt_internal_Callback_getEntryCount - (JNIEnv *env, jclass that) -{ - return (jint)callbackEntryCount; -} - -JNIEXPORT void JNICALL Java_org_eclipse_swt_internal_Callback_setEnabled - (JNIEnv *env, jclass that, jboolean enable) -{ - callbackEnabled = enable; -} - -JNIEXPORT void JNICALL Java_org_eclipse_swt_internal_Callback_reset - (JNIEnv *env, jclass that) -{ - memset((void *)&callbackData, 0, sizeof(callbackData)); -} - -jintLong callback(int index, ...) -{ - if (!callbackEnabled) return 0; - - { - JNIEnv *env = NULL; - jmethodID mid = callbackData[index].methodID; - jobject object = callbackData[index].object; - jboolean isStatic = callbackData[index].isStatic; - jboolean isArrayBased = callbackData[index].isArrayBased; - jint argCount = callbackData[index].argCount; - jintLong result = callbackData[index].errorResult; - int detach = 0; - va_list vl; - -#ifdef DEBUG_CALL_PRINTS - fprintf(stderr, "* callback starting %d\n", counter++); -#endif - -#ifdef JNI_VERSION_1_2 - if (IS_JNI_1_2) { - (*jvm)->GetEnv(jvm, (void **)&env, JNI_VERSION_1_2); - } -#endif - -#ifdef JNI_VERSION_1_4 - if (env == NULL) { - if (JNI_VERSION == JNI_VERSION_1_4) { - (*jvm)->AttachCurrentThreadAsDaemon(jvm, (void **)&env, NULL); - } - } -#endif - - if (env == NULL) { - (*jvm)->AttachCurrentThread(jvm, (void **)&env, NULL); - if (IS_JNI_1_2) detach = 1; - } - - /* If the current thread is not attached to the VM, it is not possible to call into the VM */ - if (env == NULL) { -#ifdef DEBUG_CALL_PRINTS - fprintf(stderr, "* could not get env\n"); -#endif - goto noEnv; - } - - /* If an exception has occurred in previous callbacks do not call into the VM. */ - if ((*env)->ExceptionOccurred(env)) { - goto done; - } - - /* Call into the VM. */ - ATOMIC_INC(callbackEntryCount); - va_start(vl, index); - if (isArrayBased) { - int i; - jintLongArray argsArray = (*env)->NewIntLongArray(env, argCount); - if (argsArray != NULL) { - jintLong *elements = (*env)->GetIntLongArrayElements(env, argsArray, NULL); - if (elements != NULL) { - for (i=0; i<argCount; i++) { - elements[i] = va_arg(vl, jintLong); - } - (*env)->ReleaseIntLongArrayElements(env, argsArray, elements, 0); - if (isStatic) { - result = (*env)->CallStaticIntLongMethod(env, object, mid, argsArray); - } else { - result = (*env)->CallIntLongMethod(env, object, mid, argsArray); - } - } - /* - * This function may be called many times before returning to Java, - * explicitly delete local references to avoid GP's in certain VMs. - */ - (*env)->DeleteLocalRef(env, argsArray); - } - } else { - if (isStatic) { - result = (*env)->CallStaticIntLongMethodV(env, object, mid, vl); - } else { - result = (*env)->CallIntLongMethodV(env, object, mid, vl); - } - } - va_end(vl); - ATOMIC_DEC(callbackEntryCount); - -done: - /* If an exception has occurred in Java, return the error result. */ - if ((*env)->ExceptionOccurred(env)) { -#ifdef DEBUG_CALL_PRINTS - fprintf(stderr, "* java exception occurred\n"); - (*env)->ExceptionDescribe(env); -#endif - result = callbackData[index].errorResult; - } - - if (detach) { - (*jvm)->DetachCurrentThread(jvm); - env = NULL; - } - -noEnv: - -#ifdef DEBUG_CALL_PRINTS - fprintf(stderr, "* callback exiting %d\n", --counter); -#endif - - return result; - } -} - -/* ------------- callback class calls end --------------- */ |