P09 lab code added

P09_Prozesse_und_Threads/Prozesse_und_Threads/Aufgabe09/ProcA9.c

@@ -0,0 +1,112 @@
+//***************************************************************************
+// File:             ProcA9.c
+// Original Author:  M. Thaler (Modul BSY)
+//***************************************************************************
+
+//***************************************************************************
+// system includes
+//***************************************************************************
+
+#include <sys/types.h>
+#include <sys/wait.h>
+#include <sys/time.h>
+#include <unistd.h>
+#include <stdio.h>
+#include <errno.h>
+#include <stdlib.h>
+#include <pthread.h>
+
+#include "selectCPU.h"
+
+//**************************************************************************
+// global data
+#define ARRAY_SIZE 8
+char GArray[ARRAY_SIZE][ARRAY_SIZE];
+
+//**************************************************************************
+
+void *ThreadF(void *letter) {
+    int    i,j;
+    int    LowLim, HighLim;
+    char   letr;
+
+    letr =  *(char *)letter;
+    if (letr == 'p') {          // paremeter = p: fill lower half of array
+        LowLim = 0; HighLim = ARRAY_SIZE / 2;
+    }
+    else {                       //  paremeter != p: fill upper half of array
+        LowLim = ARRAY_SIZE / 2; HighLim = ARRAY_SIZE;
+    }
+    
+    for (i = LowLim; i < HighLim; i++) {    // fill own half
+        for (j = 0; j <  ARRAY_SIZE; j++)
+            GArray[i][j] = letr;
+    } 
+
+    for (i = 0; i < ARRAY_SIZE; i++) {      // print whole array
+        for (j = 0; j <  ARRAY_SIZE; j++)
+            printf("%c ", GArray[i][j]);
+        printf("\n");
+    }
+    printf("\n");
+    fflush(stdout);
+    pthread_exit(0);
+}
+
+//***************************************************************************
+// Function: main(), parameter: none
+//***************************************************************************
+
+int main(void) {
+
+    pthread_t   thread1, thread2;
+    int         i,j, pthr;
+    char        letter1, letter2;
+  
+    selectCPU(0);                       // run on CPU 0
+
+    // flip coin to select p or c first
+    struct timeval tv;
+    gettimeofday(&tv, NULL);
+    srandom(tv.tv_usec);                // evaluate seed
+    int head = (int)(random()) >> 7;    // flip coin
+    head &= 0x1;
+    if (head) {
+        letter1 = 'p';
+        letter2 = 'c';
+    }
+    else {
+        letter1 = 'c';
+        letter2 = 'p';
+    }
+
+    for (i = 0; i < ARRAY_SIZE; i++)
+        for (j = 0; j <  ARRAY_SIZE; j++)
+            GArray[i][j] = '-';
+
+    printf("\nArray vor Threads\n\n");
+    for (i = 0; i < ARRAY_SIZE; i++) {
+        for (j = 0; j <  ARRAY_SIZE; j++)
+            printf("%c ", GArray[i][j]);
+        printf("\n");
+    }
+    printf("\n");
+
+    pthr = pthread_create(&thread1, NULL, ThreadF, (void *)&letter1);
+    if (pthr != 0) perror("Could not create thread");
+    pthr = pthread_create(&thread2, NULL, ThreadF, (void *)&letter2);
+    if (pthr != 0) perror("Could not create thread");
+
+    pthread_join(thread1, NULL);
+    pthread_join(thread2, NULL);
+  
+    printf("\n... nach Threads\n");
+        for (i = 0; i < ARRAY_SIZE; i++) {
+            for (j = 0; j <  ARRAY_SIZE; j++)
+                printf("%c ", GArray[i][j]);
+        printf("\n");
+    }
+}
+
+//***************************************************************************
+

P09_Prozesse_und_Threads/Prozesse_und_Threads/Aufgabe09/makefile

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+# *************************************************************
+# Original Autor:  M. Thaler (Modul BSY)
+# *************************************************************
+
+CMP=        gcc -std=gnu99 -pthread
+CMPFLAGS=   -Wall 
+LDFLAGS=
+EXENAME1=   ProcA9.e
+FNAM1=      ProcA9.o selectCPU.o
+LIBNAME=    
+
+$(EXENAME1):	$(FNAM1)
+	$(CMP)  $(FNAM1) $(LDFLAGS) $(LIBNAME) -o $@
+
+.c.o:
+	$(CMP) -c $(CMPFLAGS) $< 
+
+.cc.o:
+	$(CMP) -c $(CMPFLAGS) $< 
+
+clean:
+	rm -f *.o $(EXENAME1)
+
+all:
+	@make clean
+	@make
+

P09_Prozesse_und_Threads/Prozesse_und_Threads/Aufgabe09/selectCPU.c

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+//******************************************************************************
+// File:             setCPU.c
+// Original Author:  M. Thaler (Modul BSY)
+//******************************************************************************
+
+#define _GNU_SOURCE
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <sys/types.h>
+
+#ifdef __linux
+#include <sched.h>
+#endif
+
+//******************************************************************************
+
+#ifdef __linux
+
+void selectCPU(unsigned int n) { 
+    cpu_set_t cpuset; 
+    if (n >= sysconf(_SC_NPROCESSORS_ONLN)) {
+        printf("CPU %d not availble\n", n);
+        exit(0);
+    }
+    sched_getaffinity(0, sizeof(cpu_set_t), &cpuset); 
+    CPU_ZERO(&cpuset);
+    CPU_SET(n, &cpuset);
+    sched_setaffinity(0, sizeof(cpu_set_t), &cpuset); 
+}
+#endif
+
+#ifdef __APPLE__
+void selectCPU(unsigned int n) { 
+    printf("Cannot set single CPU on OSX\n ... continue anyway");
+}
+#endif
+
+//******************************************************************************
+

P09_Prozesse_und_Threads/Prozesse_und_Threads/Aufgabe09/selectCPU.h

@@ -0,0 +1,15 @@
+//******************************************************************************
+// File:             setCPU.h
+// Original Author:  M. Thaler (Modul BSY)
+//******************************************************************************
+
+#ifndef SET_CPUS_HEADER_FILE
+#define SET_CPUS_HEADER_FILE
+
+//******************************************************************************
+
+void selectCPU(unsigned int n);
+
+//******************************************************************************
+
+#endif