use a pthread mutex for interrupts

diff --git a/Makefile b/Makefile
index d77f96afe3d65af77816d26bef879f5454a5784b..8456d8da3da006d87a70d8914d97bfded5fa4d3b 100644 (file)
--- a/Makefile
+++ b/Makefile
@@ -1,7 +1,7 @@
 CFLAGS=-Wall
 
 xilinx.so: xilinx.c xilinx.h
-       gcc $(CFLAGS) $< -o $@ -ldl -lusb -shared
+       gcc $(CFLAGS) $< -o $@ -ldl -lusb -lpthread -shared
 
 clean:
        rm -f xilinx.so

diff --git a/usb-driver.c b/usb-driver.c
index b92c9516a6e8f35c989f4a5b407690194bf94ac9..2eece1e76344b45ed0ce229c71f97ba7563bc93d 100644 (file)
--- a/usb-driver.c
+++ b/usb-driver.c
@@ -20,6 +20,7 @@
 #include <stdio.h>
 #include <usb.h>
 #include <signal.h>
+#include <pthread.h>
 #include "xilinx.h"
 
 static int (*ioctl_func) (int, int, void *) = NULL;
@@ -31,6 +32,7 @@ static struct usb_device *usbdevice;
 static usb_dev_handle *usb_devhandle = NULL;
 static unsigned long card_type;
 static int ints_enabled = 0;
+static pthread_mutex_t int_wait = PTHREAD_MUTEX_INITIALIZER;
 
 #define NO_WINDRVR 1
 #undef DEBUG
@@ -232,10 +234,12 @@ int do_wdioctl(int fd, unsigned int request, unsigned char *wdioctl) {
                        break;
 
                case CARD_REGISTER:
+                       /* TODO: Implement for LPT-support */
+#if 0
                        {
-                               //struct card_register* cr = (struct card_register*)(wdheader->data);
-                               /* Todo: LPT-Port already in use */
+                               struct card_register* cr = (struct card_register*)(wdheader->data);
                        }
+#endif
 #ifdef DEBUG
                        fprintf(stderr,"faking CARD_REGISTER\n");
 #endif
@@ -318,7 +322,7 @@ int do_wdioctl(int fd, unsigned int request, unsigned char *wdioctl) {
 
                                it->fEnableOk = 1;
                                ints_enabled = 1;
-                               //ret = (*ioctl_func) (fd, request, wdioctl);
+                               pthread_mutex_trylock(&int_wait);
                        }
 
                        break;
@@ -339,6 +343,7 @@ int do_wdioctl(int fd, unsigned int request, unsigned char *wdioctl) {
                                it->dwCounter = 0;
                                it->fStopped = 1;
                                ints_enabled = 0;
+                               pthread_mutex_unlock(&int_wait);
 #endif
 #ifdef DEBUG
                                fprintf(stderr,"Handle: %lu, Options: %lx, ncmds: %lu, enableok: %lu, count: %lu, lost: %lu, stopped: %lu\n", it->hInterrupt, it->dwOptions, it->dwCmds, it->fEnableOk, it->dwCounter, it->dwLost, it->fStopped);
@@ -366,7 +371,6 @@ int do_wdioctl(int fd, unsigned int request, unsigned char *wdioctl) {
                                        /* FIXME: Select right interface! */
                                        ret = usb_claim_interface(usb_devhandle, usbdevice->config[0].interface[usi->dwInterfaceNum].altsetting[usi->dwAlternateSetting].bInterfaceNumber);
                                        if (!ret) {
-                                               //ret = usb_set_configuration(usb_devhandle, usbdevice->config[0].bConfigurationValue);
                                                if(!ret) {
                                                        ret = usb_set_altinterface(usb_devhandle, usi->dwAlternateSetting);
                                                        if (ret)
@@ -397,7 +401,6 @@ int do_wdioctl(int fd, unsigned int request, unsigned char *wdioctl) {
                                fprintf(stderr, "unique: %lu, bytes: %lu, options: %lx\n", ugdd->dwUniqueID, ugdd->dwBytes, ugdd->dwOptions);
 #endif
                                pSize = ugdd->dwBytes;
-                               //ret = (*ioctl_func) (fd, request, wdioctl);
                                if (!ugdd->dwBytes) {
                                        if (usbdevice) {
                                                ugdd->dwBytes = usb_deviceinfo(NULL);
@@ -508,10 +511,10 @@ int do_wdioctl(int fd, unsigned int request, unsigned char *wdioctl) {
                                        if (it->dwCounter == 0) {
                                                it->dwCounter = 1;
                                        } else {
-                                               while(ints_enabled) {sleep(1);}
+                                               pthread_mutex_lock(&int_wait);
                                        }
                                } else {
-                                       while(ints_enabled) {sleep(1);}
+                                       pthread_mutex_lock(&int_wait);
                                }
 #endif