rados: rename pool to ioctx

Signed-off-by: Noah Watkins <noahwatkins@gmail.com>

README.md

@@ -51,15 +51,15 @@ similar to a standard file I/O interface:
 
 ```go
 // open a pool handle
-pool, err := conn.OpenPool("mypool")
+ioctx, err := conn.OpenIOContext("mypool")
 
 // write some data
 bytes_in := []byte("input data")
-err = pool.Write("obj", bytes_in, 0)
+err = ioctx.Write("obj", bytes_in, 0)
 
 // read the data back out
 bytes_out := make([]byte, len(bytes_in))
-n_out, err := pool.Read("obj", bytes_out, 0)
+n_out, err := ioctx.Read("obj", bytes_out, 0)
 
 if bytes_in != bytes_out {
     fmt.Println("Output is not input!")

conn.go

@@ -79,10 +79,10 @@ func (c *Conn) ReadDefaultConfigFile() error {
     }
 }
 
-func (c *Conn) OpenPool(pool string) (*Pool, error) {
+func (c *Conn) OpenIOContext(pool string) (*IOContext, error) {
     c_pool := C.CString(pool)
     defer C.free(unsafe.Pointer(c_pool))
-    ioctx := &Pool{}
+    ioctx := &IOContext{}
     ret := C.rados_ioctx_create(c.cluster, c_pool, &ioctx.ioctx)
     if ret == 0 {
         return ioctx, nil

ioctx.go

@@ -7,14 +7,14 @@ import "C"
 
 import "unsafe"
 
-// Pool represents a context for performing I/O within a pool.
-type Pool struct {
+// IOContext represents a context for performing I/O within a pool.
+type IOContext struct {
     ioctx C.rados_ioctx_t
 }
 
 // Write writes len(data) bytes to the object with key oid starting at byte
 // offset offset. It returns an error, if any.
-func (p *Pool) Write(oid string, data []byte, offset uint64) error {
+func (p *IOContext) Write(oid string, data []byte, offset uint64) error {
     c_oid := C.CString(oid)
     defer C.free(unsafe.Pointer(c_oid))
 
@@ -32,7 +32,7 @@ func (p *Pool) Write(oid string, data []byte, offset uint64) error {
 
 // Read reads up to len(data) bytes from the object with key oid starting at byte
 // offset offset. It returns the number of bytes read and an error, if any.
-func (p *Pool) Read(oid string, data []byte, offset uint64) (int, error) {
+func (p *IOContext) Read(oid string, data []byte, offset uint64) (int, error) {
     if len(data) == 0 {
         return 0, nil
     }
@@ -55,7 +55,7 @@ func (p *Pool) Read(oid string, data []byte, offset uint64) (int, error) {
 }
 
 // Delete deletes the object with key oid. It returns an error, if any.
-func (p *Pool) Delete(oid string) error {
+func (p *IOContext) Delete(oid string) error {
     c_oid := C.CString(oid)
     defer C.free(unsafe.Pointer(c_oid))
 
@@ -72,7 +72,7 @@ func (p *Pool) Delete(oid string) error {
 // enlarges the object, the new area is logically filled with zeroes. If the
 // operation shrinks the object, the excess data is removed. It returns an
 // error, if any.
-func (p *Pool) Truncate(oid string, size uint64) error {
+func (p *IOContext) Truncate(oid string, size uint64) error {
     c_oid := C.CString(oid)
     defer C.free(unsafe.Pointer(c_oid))
 

rados_test.go

@@ -82,7 +82,7 @@ func TestGetClusterStats(t *testing.T) {
     err := conn.MakePool(poolname)
     assert.NoError(t, err)
 
-    pool, err := conn.OpenPool(poolname)
+    pool, err := conn.OpenIOContext(poolname)
     assert.NoError(t, err)
 
     // grab current stats
@@ -290,7 +290,7 @@ func TestReadWrite(t *testing.T) {
     err := conn.MakePool(pool_name)
     assert.NoError(t, err)
 
-    pool, err := conn.OpenPool(pool_name)
+    pool, err := conn.OpenIOContext(pool_name)
     assert.NoError(t, err)
 
     bytes_in := []byte("input data")