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-rw-r--r--include/grpc++/impl/call.h141
1 files changed, 130 insertions, 11 deletions
diff --git a/include/grpc++/impl/call.h b/include/grpc++/impl/call.h
index 64fa5d6efb..1fa4490779 100644
--- a/include/grpc++/impl/call.h
+++ b/include/grpc++/impl/call.h
@@ -60,6 +60,93 @@ void FillMetadataMap(grpc_metadata_array* arr,
grpc_metadata* FillMetadataArray(
const std::multimap<grpc::string, grpc::string>& metadata);
+/// Per-message write options.
+class WriteOptions {
+ public:
+ WriteOptions() : flags_(0) {}
+ WriteOptions(const WriteOptions& other) : flags_(other.flags_) {}
+
+ /// Clear all flags.
+ inline void Clear() {
+ flags_ = 0;
+ }
+
+ /// Returns raw flags bitset.
+ inline gpr_uint32 flags() const {
+ return flags_;
+ }
+
+ /// Sets flag for the disabling of compression for the next message write.
+ ///
+ /// \sa GRPC_WRITE_NO_COMPRESS
+ inline WriteOptions& set_no_compression() {
+ SetBit(GRPC_WRITE_NO_COMPRESS);
+ return *this;
+ }
+
+ /// Clears flag for the disabling of compression for the next message write.
+ ///
+ /// \sa GRPC_WRITE_NO_COMPRESS
+ inline WriteOptions& clear_no_compression() {
+ ClearBit(GRPC_WRITE_NO_COMPRESS);
+ return *this;
+ }
+
+ /// Get value for the flag indicating whether compression for the next
+ /// message write is forcefully disabled.
+ ///
+ /// \sa GRPC_WRITE_NO_COMPRESS
+ inline bool get_no_compression() const {
+ return GetBit(GRPC_WRITE_NO_COMPRESS);
+ }
+
+ /// Sets flag indicating that the write may be buffered and need not go out on
+ /// the wire immediately.
+ ///
+ /// \sa GRPC_WRITE_BUFFER_HINT
+ inline WriteOptions& set_buffer_hint() {
+ SetBit(GRPC_WRITE_BUFFER_HINT);
+ return *this;
+ }
+
+ /// Clears flag indicating that the write may be buffered and need not go out
+ /// on the wire immediately.
+ ///
+ /// \sa GRPC_WRITE_BUFFER_HINT
+ inline WriteOptions& clear_buffer_hint() {
+ ClearBit(GRPC_WRITE_BUFFER_HINT);
+ return *this;
+ }
+
+ /// Get value for the flag indicating that the write may be buffered and need
+ /// not go out on the wire immediately.
+ ///
+ /// \sa GRPC_WRITE_BUFFER_HINT
+ inline bool get_buffer_hint() const {
+ return GetBit(GRPC_WRITE_BUFFER_HINT);
+ }
+
+ WriteOptions& operator=(const WriteOptions& rhs) {
+ flags_ = rhs.flags_;
+ return *this;
+ }
+
+ private:
+ void SetBit(const gpr_int32 mask) {
+ flags_ |= mask;
+ }
+
+ void ClearBit(const gpr_int32 mask) {
+ flags_ &= ~mask;
+ }
+
+ bool GetBit(const gpr_int32 mask) const {
+ return flags_ & mask;
+ }
+
+ gpr_uint32 flags_;
+};
+
/// Default argument for CallOpSet. I is unused by the class, but can be
/// used for generating multiple names for the same thing.
template <int I>
@@ -104,6 +191,12 @@ class CallOpSendMessage {
public:
CallOpSendMessage() : send_buf_(nullptr), own_buf_(false) {}
+ /// Send \a message using \a options for the write. The \a options are cleared
+ /// after use.
+ template <class M>
+ Status SendMessage(const M& message,
+ const WriteOptions& options) GRPC_MUST_USE_RESULT;
+
template <class M>
Status SendMessage(const M& message) GRPC_MUST_USE_RESULT;
@@ -112,8 +205,10 @@ class CallOpSendMessage {
if (send_buf_ == nullptr) return;
grpc_op* op = &ops[(*nops)++];
op->op = GRPC_OP_SEND_MESSAGE;
- op->flags = 0;
+ op->flags = write_options_.flags();
op->data.send_message = send_buf_;
+ // Flags are per-message: clear them after use.
+ write_options_.Clear();
}
void FinishOp(bool* status, int max_message_size) {
if (own_buf_) grpc_byte_buffer_destroy(send_buf_);
@@ -122,14 +217,22 @@ class CallOpSendMessage {
private:
grpc_byte_buffer* send_buf_;
+ WriteOptions write_options_;
bool own_buf_;
};
template <class M>
-Status CallOpSendMessage::SendMessage(const M& message) {
+Status CallOpSendMessage::SendMessage(const M& message,
+ const WriteOptions& options) {
+ write_options_ = options;
return SerializationTraits<M>::Serialize(message, &send_buf_, &own_buf_);
}
+template <class M>
+Status CallOpSendMessage::SendMessage(const M& message) {
+ return SendMessage(message, WriteOptions());
+}
+
template <class R>
class CallOpRecvMessage {
public:
@@ -172,17 +275,34 @@ class CallOpRecvMessage {
grpc_byte_buffer* recv_buf_;
};
+namespace CallOpGenericRecvMessageHelper {
+class DeserializeFunc {
+ public:
+ virtual Status Deserialize(grpc_byte_buffer* buf, int max_message_size) = 0;
+};
+
+template <class R>
+class DeserializeFuncType GRPC_FINAL : public DeserializeFunc {
+ public:
+ DeserializeFuncType(R* message) : message_(message) {}
+ Status Deserialize(grpc_byte_buffer* buf,
+ int max_message_size) GRPC_OVERRIDE {
+ return SerializationTraits<R>::Deserialize(buf, message_, max_message_size);
+ }
+
+ private:
+ R* message_; // Not a managed pointer because management is external to this
+};
+} // namespace CallOpGenericRecvMessageHelper
+
class CallOpGenericRecvMessage {
public:
CallOpGenericRecvMessage() : got_message(false) {}
template <class R>
void RecvMessage(R* message) {
- deserialize_ = [message](grpc_byte_buffer* buf,
- int max_message_size) -> Status {
- return SerializationTraits<R>::Deserialize(buf, message,
- max_message_size);
- };
+ deserialize_.reset(
+ new CallOpGenericRecvMessageHelper::DeserializeFuncType<R>(message));
}
bool got_message;
@@ -201,7 +321,7 @@ class CallOpGenericRecvMessage {
if (recv_buf_) {
if (*status) {
got_message = true;
- *status = deserialize_(recv_buf_, max_message_size).ok();
+ *status = deserialize_->Deserialize(recv_buf_, max_message_size).ok();
} else {
got_message = false;
grpc_byte_buffer_destroy(recv_buf_);
@@ -210,12 +330,11 @@ class CallOpGenericRecvMessage {
got_message = false;
*status = false;
}
- deserialize_ = DeserializeFunc();
+ deserialize_.reset();
}
private:
- typedef std::function<Status(grpc_byte_buffer*, int)> DeserializeFunc;
- DeserializeFunc deserialize_;
+ std::unique_ptr<CallOpGenericRecvMessageHelper::DeserializeFunc> deserialize_;
grpc_byte_buffer* recv_buf_;
};