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31 lines
945 B
C
31 lines
945 B
C
#pragma once
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#include "arch.h" // For size_t
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// Single producer, single consumer non-blocking queue
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//
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// Producer:
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// char *buf;
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// while (mg_queue_book(q, &buf) < len) WAIT(); // Wait for space
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// memcpy(buf, my_data, len); // Copy data to the queue
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// mg_queue_add(q, len);
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//
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// Consumer:
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// char *buf;
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// while ((len = mg_queue_get(q, &buf)) == 0) WAIT();
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// mg_hexdump(buf, len); // Handle message
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// mg_queue_del(q, len);
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//
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struct mg_queue {
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char *buf;
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size_t size;
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volatile size_t tail;
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volatile size_t head;
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};
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void mg_queue_init(struct mg_queue *, char *, size_t); // Init queue
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size_t mg_queue_book(struct mg_queue *, char **buf, size_t); // Reserve space
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void mg_queue_add(struct mg_queue *, size_t); // Add new message
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size_t mg_queue_next(struct mg_queue *, char **); // Get oldest message
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void mg_queue_del(struct mg_queue *, size_t); // Delete oldest message
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