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Alejandro Acuña

2024-09-16 f56295b7f2c7282783589fb4903529b09e161daa

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// Trace Server.cpp : Defines the entry point for the DLL application.
//
 
#define IMPLEMENT_DLL_INTERFACE
 
#include "stdafx.h"
 
#include <jni.h>
#include "../JavaTracer/com_cisco_avvid_trace_JavaTracer.h"
 
#include "TraceServer.h"
#include "CTraceServer.h"
 
int Initialize();
int Uninitialize();
 
CTraceServer traceServer;
int gCount(0);
HINSTANCE TraceInstance;
CRITICAL_SECTION g_csDllMutex;
 
BOOL APIENTRY DllMain( HANDLE hModule, 
                       DWORD  ul_reason_for_call, 
                       LPVOID lpReserved
                     )
{
    switch(ul_reason_for_call) {
    case DLL_PROCESS_ATTACH:
        InitializeCriticalSection(&g_csDllMutex);
        TraceInstance = (HINSTANCE)hModule;
        gCount = 0;
        break;
    case DLL_PROCESS_DETACH:
        DeleteCriticalSection(&g_csDllMutex);
        break;
    default:
        break;
    }
    return TRUE;
}
 
DLLFUNCTION int InitializeTracing() {
    int result = Initialize();  // waits until the tracer thread has a message queue
    if (result >= 0) {
        EnterCriticalSection(&g_csDllMutex);
        result = ++gCount;
        LeaveCriticalSection(&g_csDllMutex);
    }
    return result;
}
 
DLLFUNCTION int UninitializeTracing() {
    int result = 0;
    EnterCriticalSection(&g_csDllMutex);
    result = --gCount;
    LeaveCriticalSection(&g_csDllMutex);
    if (result == 0)
        Uninitialize();
    return result;
}
 
DLLFUNCTION int Trace(char *traceBuffer) {
    return traceServer.trace(traceBuffer);
}
 
DLLFUNCTION char * GetTraceBuffer() {
    return traceServer.getTraceBuffer();
}
 
 
JNIEXPORT jint JNICALL Java_com_cisco_avvid_trace_JavaTracer_InitializeTracing
(JNIEnv *, jobject) {
    return InitializeTracing();
}
 
JNIEXPORT jint JNICALL Java_com_cisco_avvid_trace_JavaTracer_UninitializeTracing
(JNIEnv *, jobject) {
    return UninitializeTracing();
}
 
JNIEXPORT jint JNICALL Java_com_cisco_avvid_trace_JavaTracer_tracef
(JNIEnv *env, jobject, jstring traceString) {
    char *traceBuffer = GetTraceBuffer();
//  memset(traceBuffer, 0, TRACE_BUFFER_SIZE);
    if (traceBuffer) {
        const char *utf_string;
        jboolean isCopy;
        utf_string = env->GetStringUTFChars(traceString, &isCopy);
//      int bytesToCopy = strlen(utf_string);
        int bytesWritten = _snprintf(traceBuffer, TRACE_BUFFER_SIZE, "%s\n", utf_string);
        if (isCopy == JNI_TRUE) {
            env->ReleaseStringUTFChars(traceString, utf_string);
        }
        traceBuffer[TRACE_BUFFER_SIZE-1] = '\n';
    }
    return Trace(traceBuffer);
}
 
 
int Initialize() {
    return traceServer.initialize();
}
 
int Uninitialize() {
    return traceServer.uninitialize();
}