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Node js contract library AsyncCallbackEmitter implementation (#146)

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This commit is contained in:
Chalith Desaman
2020-11-09 14:21:43 +05:30
committed by GitHub
parent 3ea0299964
commit 49e30961bd
4 changed files with 123 additions and 109 deletions
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68
src/sc.cpp
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@@ -562,7 +562,7 @@ namespace sc
// Loop through input buffers for each pubkey.
for (auto &[pubkey, buflist] : bufmap)
{
if (write_iosocket_stream(fdmap[pubkey], buflist.inputs, true) == -1)
if (write_iosocket_stream(fdmap[pubkey], buflist.inputs) == -1)
return -1;
}
@@ -692,7 +692,7 @@ namespace sc
* @param inputs Buffer to write into the HP write fd.
* @param close_if_empty Close the socket after writing if this is true.
*/
int write_iosocket_stream(std::vector<int> &fds, std::list<std::string> &inputs, const bool close_if_empty)
int write_iosocket_stream(std::vector<int> &fds, std::list<std::string> &inputs)
{
// Write the inputs (if any) into the contract.
@@ -702,45 +702,37 @@ namespace sc
bool write_error = false;
if (!inputs.empty())
// Prepare the input memory segments to write with wrtiev.
// Extra one element for the header.
iovec memsegs[inputs.size() * 2 + 1];
uint8_t header[inputs.size() * 4 + 4];
header[0] = inputs.size() >> 24;
header[1] = inputs.size() >> 16;
header[2] = inputs.size() >> 8;
header[3] = inputs.size();
// Message count header.
memsegs[0].iov_base = header;
memsegs[0].iov_len = 4;
size_t i = 1;
for (std::string &input : inputs)
{
// Prepare the input memory segments to write with wrtiev.
// Extra one element for the header.
iovec memsegs[inputs.size() * 2 + 1];
uint8_t header[inputs.size() * 4 + 4];
header[0] = inputs.size() >> 24;
header[1] = inputs.size() >> 16;
header[2] = inputs.size() >> 8;
header[3] = inputs.size();
// Message count header.
memsegs[0].iov_base = header;
memsegs[0].iov_len = 4;
size_t i = 1;
for (std::string &input : inputs)
{
// 4 bytes for message len header.
header[i * 4] = input.length() >> 24;
header[i * 4 + 1] = input.length() >> 16;
header[i * 4 + 2] = input.length() >> 8;
header[i * 4 + 3] = input.length();
memsegs[i * 2 - 1].iov_base = &header[i * 4];
memsegs[i * 2 - 1].iov_len = 4;
memsegs[i * 2].iov_base = input.data();
memsegs[i * 2].iov_len = input.length();
i++;
}
if (writev(writefd, memsegs, (inputs.size() * 2 + 1)) == -1)
write_error = true;
inputs.clear();
}
else if (close_if_empty)
{
close(writefd);
fds[SOCKETFDTYPE::HPREADWRITE] = -1;
// 4 bytes for message len header.
header[i * 4] = input.length() >> 24;
header[i * 4 + 1] = input.length() >> 16;
header[i * 4 + 2] = input.length() >> 8;
header[i * 4 + 3] = input.length();
memsegs[i * 2 - 1].iov_base = &header[i * 4];
memsegs[i * 2 - 1].iov_len = 4;
memsegs[i * 2].iov_base = input.data();
memsegs[i * 2].iov_len = input.length();
i++;
}
if (writev(writefd, memsegs, (inputs.size() * 2 + 1)) == -1)
write_error = true;
inputs.clear();
if (write_error)
LOG_ERROR << errno << ": Error writing to stream socket.";