Added Linux function of ShmLib.

src/ShimLib/ShimLib.c

@@ -2,8 +2,17 @@
 #include <stdlib.h>
 #include "ShimLib.h"
 
+#ifdef _WIN32
 #include <Windows.h>
 #include <process.h>
+#else
+#include <pthread.h>
+#include <semaphore.h>
+#include <fcntl.h>
+#include <sys/time.h>
+#include <unistd.h>
+#endif
+
 #include <time.h>
 
 typedef  void(*error_cb)(const char* msg);
@@ -11,15 +20,30 @@ typedef  void(*error_cb)(const char* msg);
 int statusCountFlag = 0;
 error_cb innerCallback = NULL;
 
+#ifdef _WIN32
 void ThreadFunc(void*);
 HANDLE th;
 HANDLE e1,e2;
-int InitLib(error_cb cb) {
+#else
+void* ThreadFunc(void*);
+pthread_t th;
+sem_t e1;
+sem_t e2;
+#endif
+
+int InitLib(error_cb cb)
+{
     innerCallback = cb;
     innerCallback("11111");
+#ifdef _WIN32
     e1 = CreateEvent(NULL, FALSE, FALSE, "e1");
     e2 = CreateEvent(NULL, FALSE, FALSE, "e2");
-	th = _beginthread(ThreadFunc,0, NULL);
+    th = _beginthread(ThreadFunc, 0, NULL);
+#else
+    sem_init(&e1, 0, 0);
+    sem_init(&e2, 0, 0);
+    th = pthread_create(&th, NULL, ThreadFunc, (void*)"");
+#endif
     return 0;
 }
 
@@ -30,14 +54,28 @@ volatile int stop_flag = 0;
 volatile int empty = 0;
 char output_path[256] = {0};
 
-void ThreadFunc(void* args){
+#ifdef _WIN32
-	while (running){
+void ThreadFunc(void* args)
+{
+#else
+void* ThreadFunc(__attribute__((unused))void* args)
+{
+#endif
+    while (running)
+	{
         stop_flag = 0;
         progress = 0;
+#ifdef _WIN32		
 		WaitForSingleObject(e1, INFINITE);
-
+#else
+        sem_wait(&e1);
+#endif
         status = SCANNING;
+#ifdef _WIN32
         Sleep(300);
+#else
+        usleep(300000);
+#endif
         if (empty)
         {
             GetPreviewData();
@@ -49,7 +87,11 @@ void ThreadFunc(void* args){
             }
             if (i == 20){
                 progress = 139;
+#ifdef _WIN32
                 WaitForSingleObject(e2, INFINITE);
+#else
+                sem_wait(&e2);
+#endif
             }
             else if ( i > 20 && i<35){
                 progress = i * 2 + 100;
@@ -64,7 +106,11 @@ void ThreadFunc(void* args){
                 stop_flag = 0;
                 break;
             }
+#ifdef _WIN32
 			Sleep(300);
+#else
+           usleep(300000);
+#endif
 		}
         status = READY;
 	}
@@ -76,9 +122,17 @@ int ScanControl(ScanAction actionType) {
         case SCAN:
             printf("Do Scan!\r\n");
             statusCountFlag = 2;
+#ifdef _WIN32
             SYSTEMTIME st = {0};
             GetLocalTime(&st);
+#else
+        time_t now;
+        struct tm* st;
+        time(&now);
+        st = localtime(&now);
+#endif
             sprintf(output_path, "%d%02d%02dT%02d%02d%02d",
+#ifdef _WIN32
                     st.wYear,
                     st.wMonth,
                     st.wDay,
@@ -86,6 +140,15 @@ int ScanControl(ScanAction actionType) {
                     st.wMinute,
                     st.wSecond);
             SetEvent(e1);
+#else
+            st->tm_year+1900,
+            st->tm_mon+1,
+            st->tm_mday,
+            st->tm_hour,
+            st->tm_min,
+            st->tm_sec);
+        sem_post(&e1);
+#endif
             break;
         case PREVIEW_SCAN:
             statusCountFlag = 1;
@@ -97,11 +160,19 @@ int ScanControl(ScanAction actionType) {
             stop_flag = 1;
             progress = 0;
             status = READY;
+#ifdef _WIN32
             SetEvent(e2);
+#else
+        sem_post(&e2);
+#endif
             printf("Stop everything!\r\n");
             break;
         case SCAN_CONTINUE:
+#ifdef _WIN32
             SetEvent(e2);
+#else
+        sem_post(&e2);
+#endif
             break;
     }
 	return 0;
@@ -117,7 +188,11 @@ StatusInfo GetStatus() {
 }
 
 //result, 0 success, other false
+#ifdef _WIN32
 int SetScanInfo(const char* jsonString, int e) {
+#else
+int SetScanInfo(const __attribute__((unused))char* jsonString, __attribute__((unused))int e){
+#endif
     empty = e;
 	return 0;
 }
@@ -137,7 +212,7 @@ const char* GetPreviewData() {
     previewCount++;
     if (previewCount>3){
         status = READY;
-        innerCallback("22222");
+        innerCallback("Preview Device Error");
         return NULL;
     }
 	FILE* file;