mirror of
https://github.com/justinian/jsix.git
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b8684777e0
This commit adds a new flag, j6_channel_block, and a new flags param to the channel_receive syscall. When the block flag is specified, the caller will block waiting for data on the channel if the channel is empty.
57 lines
1.0 KiB
C++
57 lines
1.0 KiB
C++
#include <j6/errors.h>
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#include <j6/flags.h>
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#include <j6/types.h>
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#include <util/counted.h>
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#include "objects/channel.h"
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#include "syscalls/helpers.h"
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using namespace obj;
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namespace syscalls {
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j6_status_t
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channel_create(j6_handle_t *self)
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{
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construct_handle<channel>(self);
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return j6_status_ok;
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}
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j6_status_t
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channel_send(channel *self, void *data, size_t *data_len)
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{
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if (self->closed())
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return j6_status_closed;
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const util::buffer buffer {data, *data_len};
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*data_len = self->enqueue(buffer);
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return j6_status_ok;
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}
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j6_status_t
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channel_receive(channel *self, void *data, size_t *data_len, uint64_t flags)
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{
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if (self->closed())
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return j6_status_closed;
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util::buffer buffer {data, *data_len};
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const bool block = flags & j6_channel_block;
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*data_len = self->dequeue(buffer, block);
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return j6_status_ok;
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}
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j6_status_t
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channel_close(channel *self)
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{
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if (self->closed())
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return j6_status_closed;
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self->close();
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return j6_status_ok;
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}
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} // namespace syscalls
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