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use the address of the device structure for device selection in usb_open instead of the device number

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git-svn-id: https://svn.code.sf.net/p/libusbjava/code/trunk@266 94ad28fe-ef68-46b1-9651-e7ae4fcf1c4c
This commit is contained in:
spandi
2008-02-10 22:36:59 +00:00
parent 23f1164d44
commit 3fc955f9fd
2 changed files with 14 additions and 2 deletions
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9
LibusbJava/LibusbJava.cpp
View File

@@ -49,7 +49,8 @@ jfieldID usb_busFID_next, usb_busFID_prev, usb_busFID_dirname, \
// usb_device
jfieldID usb_devFID_next, usb_devFID_prev, usb_devFID_filename, \
usb_devFID_bus, usb_devFID_descriptor, usb_devFID_config, \
usb_devFID_devnum, usb_devFID_num_children, usb_devFID_children;
usb_devFID_devnum, usb_devFID_num_children, usb_devFID_children, \
usb_devFID_devStructAddr;
// usb_deviceDescriptor
jfieldID usb_devDescFID_bLength, usb_devDescFID_bDescriptorType, \
usb_devDescFID_bcdUSB, usb_devDescFID_bDeviceClass, \
@@ -168,6 +169,7 @@ JNIEXPORT jobject JNICALL Java_ch_ntb_usb_LibusbJava_usb_1get_1busses
usb_devFID_devnum = env->GetFieldID(usb_devClazz, "devnum", "B");
usb_devFID_num_children = env->GetFieldID(usb_devClazz, "num_children", "B");
usb_devFID_children = env->GetFieldID(usb_devClazz, "children", "Lch/ntb/usb/Usb_Device;");
usb_devFID_devStructAddr = env->GetFieldID(usb_devClazz, "devStructAddr", "J");
// usb_device_descriptor
@@ -347,6 +349,7 @@ JNIEXPORT jobject JNICALL Java_ch_ntb_usb_LibusbJava_usb_1get_1busses
env->SetObjectField(usb_devObj, usb_devFID_filename, env->NewStringUTF(dev->filename));
env->SetByteField(usb_devObj, usb_devFID_devnum, dev->devnum);
env->SetByteField(usb_devObj, usb_devFID_num_children, dev->num_children);
env->SetLongField(usb_devObj, usb_devFID_devStructAddr, (jlong) dev);
// device descriptor
usb_devDescObj = env->NewObject(usb_devDescClazz, usb_devDescMid);
@@ -552,12 +555,14 @@ JNIEXPORT jlong JNICALL Java_ch_ntb_usb_LibusbJava_usb_1open
}
unsigned char devnum = env->GetByteField(dev, usb_devFID_devnum);
struct usb_device *usb_device_cmp;
jlong usb_device_cmp_addr = env->GetLongField(dev, usb_devFID_devStructAddr);
struct usb_bus *tmpBus;
for (tmpBus = busses; tmpBus; tmpBus = tmpBus->next) {
struct usb_device *device;
for (device = tmpBus->devices; device; device = device->next) {
if (device->devnum == devnum){
if ((jlong) device == usb_device_cmp_addr){
return (jlong) usb_open(device);
}
}

7
java/src/ch/ntb/usb/Usb_Device.java
View File

@@ -31,6 +31,13 @@ public class Usb_Device {
private Usb_Device children;
/**
* The address of the device structure to be passed to usb_open. This value
* is used only internally so we don't use getter or setter methods.
*/
@SuppressWarnings("unused")
public long devStructAddr;
/**
* Returns the reference to the bus to which this device is connected.<br>
*