X-Git-Url: http://git.efficios.com/?p=babeltrace.git;a=blobdiff_plain;f=include%2Fbabeltrace%2Fctf%2Ftypes.h;h=95c0d5e2659056aeee33b1d09d0f23ce8a7fe2a4;hp=73288ef6681117bb8b8bd839f5bf5fc3f5f738fd;hb=670977d3f384db208f375255a83060d90075d626;hpb=f66259163f060ada8d0fee348857c968e338ea40 diff --git a/include/babeltrace/ctf/types.h b/include/babeltrace/ctf/types.h index 73288ef6..95c0d5e2 100644 --- a/include/babeltrace/ctf/types.h +++ b/include/babeltrace/ctf/types.h @@ -20,71 +20,152 @@ */ #include +#include +#include +#include +#include +#include +#include #include +#include #include +#include + +struct packet_index { + off_t offset; /* offset of the packet in the file, in bytes */ + off_t data_offset; /* offset of data within the packet */ + size_t packet_size; /* packet size, in bits */ + size_t content_size; /* content size, in bits */ +}; /* - * IMPORTANT: All lengths (len) and offsets (start, end) are expressed in bits, - * *not* in bytes. + * Always update ctf_stream_pos with ctf_move_pos and ctf_init_pos. + */ +struct ctf_stream_pos { + struct stream_pos parent; + int fd; /* backing file fd. -1 if unset. */ + GArray *packet_index; /* contains struct packet_index */ + int prot; /* mmap protection */ + int flags; /* mmap flags */ + + /* Current position */ + off_t mmap_offset; /* mmap offset in the file, in bytes */ + size_t packet_size; /* current packet size, in bits */ + size_t content_size; /* current content size, in bits */ + uint32_t *content_size_loc; /* pointer to current content size */ + char *base; /* mmap base address */ + ssize_t offset; /* offset from base, in bits. EOF for end of file. */ + size_t cur_index; /* current index in packet index */ + + int dummy; /* dummy position, for length calculation */ +}; + +static inline +struct ctf_stream_pos *ctf_pos(struct stream_pos *pos) +{ + return container_of(pos, struct ctf_stream_pos, parent); +} + +int ctf_integer_read(struct stream_pos *pos, struct definition *definition); +int ctf_integer_write(struct stream_pos *pos, struct definition *definition); +int ctf_float_read(struct stream_pos *pos, struct definition *definition); +int ctf_float_write(struct stream_pos *pos, struct definition *definition); +int ctf_string_read(struct stream_pos *pos, struct definition *definition); +int ctf_string_write(struct stream_pos *pos, struct definition *definition); +int ctf_enum_read(struct stream_pos *pos, struct definition *definition); +int ctf_enum_write(struct stream_pos *pos, struct definition *definition); +int ctf_struct_rw(struct stream_pos *pos, struct definition *definition); +int ctf_variant_rw(struct stream_pos *pos, struct definition *definition); +int ctf_array_rw(struct stream_pos *pos, struct definition *definition); +int ctf_sequence_rw(struct stream_pos *pos, struct definition *definition); + +void ctf_move_pos_slow(struct ctf_stream_pos *pos, size_t offset, int whence); + +void ctf_init_pos(struct ctf_stream_pos *pos, int fd, int open_flags); +void ctf_fini_pos(struct ctf_stream_pos *pos); + +/* + * move_pos - move position of a relative bit offset * - * All write primitives, as well as read for dynamically sized entities, can - * receive a NULL ptr/dest parameter. In this case, no write is performed, but - * the size is returned. + * TODO: allow larger files by updating base too. */ +static inline +void ctf_move_pos(struct ctf_stream_pos *pos, size_t bit_offset) +{ + printf_debug("ctf_move_pos test EOF: %zd\n", pos->offset); + if (pos->offset == EOF) + return; + + if (pos->fd >= 0) { + if (((pos->prot == PROT_READ) + && (pos->offset + bit_offset >= pos->content_size)) + || ((pos->prot == PROT_WRITE) + && (pos->offset + bit_offset >= pos->packet_size))) { + printf_debug("ctf_move_pos_slow (before call): %zd\n", + pos->offset); + ctf_move_pos_slow(pos, bit_offset, SEEK_CUR); + printf_debug("ctf_move_pos_slow (after call): %zd\n", + pos->offset); + return; + } + } + pos->offset += bit_offset; + printf_debug("ctf_move_pos after increment: %zd\n", pos->offset); +} + +/* + * align_pos - align position on a bit offset (> 0) + * + * TODO: allow larger files by updating base too. + */ +static inline +void ctf_align_pos(struct ctf_stream_pos *pos, size_t bit_offset) +{ + ctf_move_pos(pos, offset_align(pos->offset, bit_offset)); +} + +static inline +char *ctf_get_pos_addr(struct ctf_stream_pos *pos) +{ + /* Only makes sense to get the address after aligning on CHAR_BIT */ + assert(!(pos->offset % CHAR_BIT)); + return pos->base + (pos->offset / CHAR_BIT); +} + +static inline +void ctf_dummy_pos(struct ctf_stream_pos *pos, struct ctf_stream_pos *dummy) +{ + memcpy(dummy, pos, sizeof(struct ctf_stream_pos)); + dummy->dummy = 1; + dummy->fd = -1; +} + +/* + * Check if current packet can hold data. + * Returns 0 for success, negative error otherwise. + */ +static inline +int ctf_pos_packet(struct ctf_stream_pos *dummy) +{ + if (dummy->offset > dummy->packet_size) + return -ENOSPC; + return 0; +} + +static inline +void ctf_pos_pad_packet(struct ctf_stream_pos *pos) +{ + ctf_move_pos(pos, pos->packet_size - pos->offset); +} -uint64_t ctf_uint_read(struct stream_pos *pos, - const struct declaration_integer *integer_declaration); -int64_t ctf_int_read(struct stream_pos *pos, - const struct declaration_integer *integer_declaration); -void ctf_uint_write(struct stream_pos *pos, - const struct declaration_integer *integer_declaration, - uint64_t v); -void ctf_int_write(struct stream_pos *pos, - const struct declaration_integer *integer_declaration, - int64_t v); - -double ctf_double_read(struct stream_pos *pos, - const struct declaration_float *src); -void ctf_double_write(struct stream_pos *pos, - const struct declaration_float *dest, - double v); -long double ctf_ldouble_read(struct stream_pos *pos, - const struct declaration_float *src); -void ctf_ldouble_write(struct stream_pos *pos, - const struct declaration_float *dest, - long double v); -void ctf_float_copy(struct stream_pos *destp, - struct stream_pos *srcp, - const struct declaration_float *float_declaration); - -void ctf_string_copy(struct stream_pos *dest, struct stream_pos *src, - const struct declaration_string *string_declaration); -void ctf_string_read(char **dest, struct stream_pos *src, - const struct declaration_string *string_declaration); -void ctf_string_write(struct stream_pos *dest, const char *src, - const struct declaration_string *string_declaration); -void ctf_string_free_temp(char *string); - -GArray *ctf_enum_read(struct stream_pos *pos, - const struct declaration_enum *src); -void ctf_enum_write(struct stream_pos *pos, - const struct declaration_enum *dest, - GQuark q); -void ctf_struct_begin(struct stream_pos *pos, - const struct declaration_struct *struct_declaration); -void ctf_struct_end(struct stream_pos *pos, - const struct declaration_struct *struct_declaration); -void ctf_variant_begin(struct stream_pos *pos, - const struct declaration_variant *variant_declaration); -void ctf_variant_end(struct stream_pos *pos, - const struct declaration_variant *variant_declaration); -void ctf_array_begin(struct stream_pos *pos, - const struct declaration_array *array_declaration); -void ctf_array_end(struct stream_pos *pos, - const struct declaration_array *array_declaration); -void ctf_sequence_begin(struct stream_pos *pos, - const struct declaration_sequence *sequence_declaration); -void ctf_sequence_end(struct stream_pos *pos, - const struct declaration_sequence *sequence_declaration); +static inline +int ctf_pos_access_ok(struct ctf_stream_pos *pos, size_t bit_len) +{ + if (pos->offset == EOF) + return 0; + if (pos->offset + bit_len > pos->packet_size) + return 0; + return 1; +} #endif /* _BABELTRACE_CTF_TYPES_H */