CSY/reowolf Changeset - 7e252436097c · Centrum Wiskunde & Informatica (CWI)

Changeset - 7e252436097c

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Christopher Esterhuyse - 5 years ago 2020-07-23 16:31:29
christopher.esterhuyse@gmail.com

pseudo-socket API mirrors the phases of the connector

1 file changed with 29 insertions and 35 deletions:

src/ffi/pseudo_socket_api.rs

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src/ffi/pseudo_socket_api.rs

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 ///////////////////////////////////////////////////////////////////
 struct FdAllocator {
     next: Option<c_int>,
     freed: Vec<c_int>,
+}
 enum ConnectorComplex {
     Setup {
         local: Option<SocketAddr>,
         peer: Option<SocketAddr>,
     },
     Communication {
         // Invariant: connector in communication state; native has this putter and getter only.
 enum ConnectorComplexPhased {
     Setup { local: Option<SocketAddr>, peer: Option<SocketAddr> },
     Communication { putter: PortId, getter: PortId },
+}
 struct ConnectorComplex {
     connector: Connector,
         putter: PortId,
         getter: PortId,
     },
     phased: ConnectorComplexPhased,
+}
 #[derive(Default)]
 struct CcMap {
     fd_to_cc: HashMap<c_int, RwLock<ConnectorComplex>>,
     fd_allocator: FdAllocator,
+}
@@ @@ -59,36 +55,38 @@ impl FdAllocator { @@
+}
 lazy_static::lazy_static! {
     static ref CC_MAP: RwLock<CcMap> = Default::default();
+}
 impl ConnectorComplex {
     fn try_become_connected(&mut self) {
         match self {
             ConnectorComplex::Setup { local: Some(local), peer: Some(peer) } => {
         match self.phased {
             ConnectorComplexPhased::Setup { local: Some(local), peer: Some(peer) } => {
                 // complete setup
                 let mut connector = Connector::new(
                     Box::new(crate::DummyLogger),
                     crate::TRIVIAL_PD.clone(),
                     Connector::random_id(),
                 );
                 let [putter, getter] = connector.new_udp_mediator_component(*local, *peer).unwrap();
                 connector.connect(None).unwrap();
                 *self = ConnectorComplex::Communication { connector, putter, getter }
                 self.connector.connect(None).unwrap();
                 self.phased = ConnectorComplexPhased::Communication { putter, getter }
+            }
             _ => {} // setup incomplete
+        }
+    }
+}
 /////////////////////////////////
 #[no_mangle]
 pub extern "C" fn rw_socket(_domain: c_int, _type: c_int) -> c_int {
     // ignoring domain and type
     // get writer lock
     let mut w = if let Ok(w) = CC_MAP.write() { w } else { return LOCK_POISONED };
     let fd = w.fd_allocator.alloc();
     let cc = ConnectorComplex::Setup { local: None, peer: None };
     let cc = ConnectorComplex {
         connector: Connector::new(
             Box::new(crate::DummyLogger),
             crate::TRIVIAL_PD.clone(),
             Connector::random_id(),
         ),
         phased: ConnectorComplexPhased::Setup { local: None, peer: None },
     };
     w.fd_to_cc.insert(fd, RwLock::new(cc));
     fd
+}
 #[no_mangle]
 pub extern "C" fn rw_close(fd: c_int, _how: c_int) -> c_int {
     // ignoring HOW
         _ => return BAD_SOCKADDR,
     };
     // get outer reader, inner writer locks
     let r = if let Ok(r) = CC_MAP.read() { r } else { return LOCK_POISONED };
     let cc = if let Some(cc) = r.fd_to_cc.get(&fd) { cc } else { return BAD_FD };
     let mut cc = if let Ok(cc) = cc.write() { cc } else { return LOCK_POISONED };
     let cc: &mut ConnectorComplex = &mut cc;
     match cc {
         ConnectorComplex::Communication { .. } => WRONG_STATE,
         ConnectorComplex::Setup { local, .. } => {
     match &cc.phased {
         ConnectorComplexPhased::Communication { .. } => WRONG_STATE,
         ConnectorComplexPhased::Setup { local, .. } => {
             *local = Some(addr);
             cc.try_become_connected();
             ERR_OK
+        }
+    }
+}
@@ @@ -134,14 +131,13 @@ pub unsafe extern "C" fn rw_connect( @@
     };
     // assuming _domain is AF_INET and _type is SOCK_DGRAM
     // get outer reader, inner writer locks
     let r = if let Ok(r) = CC_MAP.read() { r } else { return LOCK_POISONED };
     let cc = if let Some(cc) = r.fd_to_cc.get(&fd) { cc } else { return BAD_FD };
     let mut cc = if let Ok(cc) = cc.write() { cc } else { return LOCK_POISONED };
     let cc: &mut ConnectorComplex = &mut cc;
     match cc {
     match &cc.phased {
         ConnectorComplex::Communication { .. } => WRONG_STATE,
         ConnectorComplex::Setup { peer, .. } => {
             *peer = Some(addr);
             cc.try_become_connected();
             ERR_OK
+        }
@@ @@ -156,19 +152,18 @@ pub unsafe extern "C" fn rw_send( @@
 ) -> isize {
     // ignoring flags
     // get outer reader, inner writer locks
     let r = if let Ok(r) = CC_MAP.read() { r } else { return LOCK_POISONED as isize };
     let cc = if let Some(cc) = r.fd_to_cc.get(&fd) { cc } else { return BAD_FD as isize };
     let mut cc = if let Ok(cc) = cc.write() { cc } else { return LOCK_POISONED as isize };
     let cc: &mut ConnectorComplex = &mut cc;
     match cc {
     match &cc.phased {
         ConnectorComplex::Setup { .. } => WRONG_STATE as isize,
         ConnectorComplex::Communication { connector, putter, .. } => {
             let payload = payload_from_raw(bytes_ptr, bytes_len);
             connector.put(*putter, payload).unwrap();
             connector.sync(None).unwrap();
             cc.connector.put(*putter, payload).unwrap();
             cc.connector.sync(None).unwrap();
             bytes_len as isize
+        }
+    }
+}
 #[no_mangle]
 pub unsafe extern "C" fn rw_recv(
@@ @@ -179,19 +174,18 @@ pub unsafe extern "C" fn rw_recv( @@
 ) -> isize {
     // ignoring flags
     // get outer reader, inner writer locks
     let r = if let Ok(r) = CC_MAP.read() { r } else { return LOCK_POISONED as isize };
     let cc = if let Some(cc) = r.fd_to_cc.get(&fd) { cc } else { return BAD_FD as isize };
     let mut cc = if let Ok(cc) = cc.write() { cc } else { return LOCK_POISONED as isize };
     let cc: &mut ConnectorComplex = &mut cc;
     match cc {
     match &cc.phased {
         ConnectorComplex::Setup { .. } => WRONG_STATE as isize,
         ConnectorComplex::Communication { connector, getter, .. } => {
             connector.get(*getter).unwrap();
             connector.sync(None).unwrap();
             let slice = connector.gotten(*getter).unwrap().as_slice();
             cc.connector.get(*getter).unwrap();
             cc.connector.sync(None).unwrap();
             let slice = cc.connector.gotten(*getter).unwrap().as_slice();
             if !bytes_ptr.is_null() {
                 let cpy_msg_bytes = slice.len().min(bytes_len);
                 std::ptr::copy_nonoverlapping(slice.as_ptr(), bytes_ptr as *mut u8, cpy_msg_bytes);
+            }
             slice.len() as isize
+        }

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