mirror of https://github.com/tailix/libshmemq.git
64 lines
1.2 KiB
C
64 lines
1.2 KiB
C
#ifndef SHMEMQ_INCLUDED
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#define SHMEMQ_INCLUDED 1
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#include <stdbool.h>
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#include <stddef.h>
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#define SHMEMQ_NAME_SIZE_MAX ((size_t)255)
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#define SHMEMQ_NAME_SLEN_MAX (SHMEMQ_NAME_SIZE_MAX - 1)
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#define SHMEMQ_FRAME_SIZE ((size_t)8)
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#define SHMEMQ_FRAME_DATA_SIZE \
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(SHMEMQ_FRAME_SIZE - sizeof(struct Shmemq_FrameHeader))
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#ifdef __cplusplus
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extern "C" {
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#endif
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enum Shmemq_Error {
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SHMEMQ_ERROR_NONE = 0,
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SHMEMQ_ERROR_MALLOC = 1,
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SHMEMQ_ERROR_INVALID_NAME = 2,
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SHMEMQ_ERROR_SHARED_MEMORY = 3,
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};
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struct Shmemq_FrameHeader {
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size_t frame_size;
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};
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struct Shmemq_Frame {
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struct Shmemq_FrameHeader header;
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unsigned char data[SHMEMQ_FRAME_DATA_SIZE];
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};
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struct Shmemq_BufferHeader {
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size_t frames_count;
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size_t read_frame_index;
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size_t write_frame_index;
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};
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struct Shmemq_Buffer {
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struct Shmemq_BufferHeader header;
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struct Shmemq_Frame frames[];
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};
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struct Shmemq {
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char name[SHMEMQ_NAME_SIZE_MAX];
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bool is_consumer;
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int shm_id;
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struct Shmemq_Buffer *buffer;
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};
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struct Shmemq*
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shmemq_new(const char *name, size_t size, enum Shmemq_Error *error_ptr);
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enum Shmemq_Error
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shmemq_init(struct Shmemq *shmemq, const char *name, size_t size);
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#ifdef __cplusplus
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}
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#endif
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#endif
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