add a "context" for handling multiple instruments

1 files changed, 23 insertions, 21 deletions

diff --git a/libvxi11client/client.c b/libvxi11client/client.c
index ee5fe47..b851347 100644
--- a/libvxi11client/client.c
+++ b/libvxi11client/client.c
@@ -40,16 +40,18 @@ int main(int argc, char *argv[]) {
 		exit(1);
 	}
 
+	Context ctx;
+
 	int err = 0;
 
-	if ((err = vxi11_open(argv[1], NULL)) > 0) {
+	if ((err = vxi11_open(&ctx, argv[1], NULL)) > 0) {
 
 		/**
 		 * Basic tests
 		 */
 
 		// write some bytes
-		int byteswritten = vxi11_write(IDENTIFY, sizeof(IDENTIFY), false, false);
+		int byteswritten = vxi11_write(&ctx, IDENTIFY, sizeof(IDENTIFY), false, false);
 		if (byteswritten >= 0)
 			printf("Wrote %d bytes\n", byteswritten);
 		else
@@ -57,44 +59,44 @@ int main(int argc, char *argv[]) {
 
 		// read some bytes
 		char buffer[1024];
-		int bytesread = vxi11_read(buffer, sizeof(buffer), false, false, 0);
+		int bytesread = vxi11_read(&ctx, buffer, sizeof(buffer), false, false, 0);
 		if (bytesread >= 0)
 			printf("Read %d bytes, %s\n", bytesread, buffer);
 		else
 			printf("Error reading data\n");
 
 		// trigger
-		if (vxi11_trigger(false) > 0)
+		if (vxi11_trigger(&ctx, false) > 0)
 			printf("triggered\n");
 
 		// clear
-		if (vxi11_clear(false) > 0)
+		if (vxi11_clear(&ctx, false) > 0)
 			printf("cleared\n");
 
 		// abort
-		if ((err = vxi11_abort()) > 0)
+		if ((err = vxi11_abort(&ctx)) > 0)
 			printf("aborted\n");
 		else
 			printf("abort failed; %s\n", geterrorstring(err));
 
 		// lock
-		if ((err = vxi11_lock(false)) > 0)
+		if ((err = vxi11_lock(&ctx, false)) > 0)
 			printf("locked\n");
 
 		// unlock
-		if ((err = vxi11_unlock()) > 0)
+		if ((err = vxi11_unlock(&ctx)) > 0)
 			printf("unlocked\n");
 
 		// remote
-		if ((err = vxi11_remote(false)) > 0)
+		if ((err = vxi11_remote(&ctx, false)) > 0)
 			printf("remote'd\n");
 
 		// local
-		if ((err = vxi11_local(false)) > 0)
+		if ((err = vxi11_local(&ctx, false)) > 0)
 			printf("local'd\n");
 
 		// read the status byte
-		int statusbyte = vxi11_readstatusbyte(false);
+		int statusbyte = vxi11_readstatusbyte(&ctx, false);
 		if (statusbyte >= 0)
 			printf("Status byte is 0x%02x\n", statusbyte);
 		else
@@ -106,9 +108,9 @@ int main(int argc, char *argv[]) {
 
 		// try locking twice
 		printf("-- Locking twice --\n");
-		if ((err = vxi11_lock(false)) > 0) {
+		if ((err = vxi11_lock(&ctx, false)) > 0) {
 			printf("locked\n");
-			if ((err = vxi11_lock(false)) > 0) {
+			if ((err = vxi11_lock(&ctx, false)) > 0) {
 				printf("locked again!!\n");
 				exit(1);
 			}
@@ -116,7 +118,7 @@ int main(int argc, char *argv[]) {
 				printf("Second lock failed; %s\n", geterrorstring(err));
 			}
 		}
-		if ((err = vxi11_unlock()) > 0)
+		if ((err = vxi11_unlock(&ctx)) > 0)
 			printf("unlocked\n");
 		else {
 			printf("error unlocking; %s\n", geterrorstring(err));
@@ -127,7 +129,7 @@ int main(int argc, char *argv[]) {
 
 		// try unlocking unlocked device
 		printf("-- Unlocking when unlocked --\n");
-		if ((err = vxi11_unlock()) > 0) {
+		if ((err = vxi11_unlock(&ctx)) > 0) {
 			printf("Unlocked!!\n");
 			exit(1);
 		}
@@ -138,11 +140,11 @@ int main(int argc, char *argv[]) {
 		// Interrupt channel tests
 		printf("-- Testing interrupt channel --\n");
 		// create interrupt channel
-		if ((err = vxi11_create_intr_chan()) > 0) {
+		if ((err = vxi11_create_intr_chan(&ctx)) > 0) {
 			printf("Created interrupt channel\n");
 
 			// enable interrupts
-			if ((err = vxi11_enable_srq(true, "handle", interruptcallback)) > 0)
+			if ((err = vxi11_enable_srq(&ctx, true, "handle", interruptcallback)) > 0)
 				printf("Enabled interrupts\n");
 			else
 				printf("Error enabling interrupts; %s\n", geterrorstring(err));
@@ -150,13 +152,13 @@ int main(int argc, char *argv[]) {
 			sleep(10);
 
 			// disable interrupts
-			if ((err = vxi11_enable_srq(false, NULL, NULL)) > 0)
+			if ((err = vxi11_enable_srq(&ctx, false, NULL, NULL)) > 0)
 				printf("Disabled interrupts\n");
 			else
 				printf("Error disabling interrupts; %s\n", geterrorstring(err));
 
 			// destroy interrupt channel
-			if ((err = vxi11_destroy_intr_chan()) > 0)
+			if ((err = vxi11_destroy_intr_chan(&ctx)) > 0)
 				printf("Destroyed interrupt channel\n");
 			else
 				printf("Error destroying interrupt channel; %s\n", geterrorstring(err));
@@ -166,13 +168,13 @@ int main(int argc, char *argv[]) {
 		printf("\n");
 
 		// docmd
-		if ((err = vxi11_docmd(0x00, false)) > 0)
+		if ((err = vxi11_docmd(&ctx, 0x00, false)) > 0)
 			printf("did command, should fail!\n");
 		else
 			printf("Error calling docmd; %s\n", geterrorstring(err));
 
 		// close
-		if ((err = vxi11_close() > 0))
+		if ((err = vxi11_close(&ctx) > 0))
 			printf("Closed\n");
 	}
 	else {