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Set up and tear down the prefilter pipeline

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This commit is contained in:
Eric Fischer 2016-12-08 16:09:20 -08:00
parent d940eb1cef
commit 16df86c26e
1 changed files with 34 additions and 1 deletions
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35
tile.cpp
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@ -1243,6 +1243,18 @@ long long write_tile(FILE *geoms, long long *geompos_in, char *metabase, char *s
*geompos_in = og;
}
int prefilter_write = -1, prefilter_read = -1;
pid_t prefilter_pid = 0;
FILE *prefilter_fd = NULL;
if (prefilter != NULL) {
setup_filter(prefilter, &prefilter_write, &prefilter_read, &prefilter_pid, z, tx, ty);
prefilter_fd = fdopen(prefilter_write, "w");
if (prefilter_fd == NULL) {
perror("freopen prefilter");
exit(EXIT_FAILURE);
}
}
while (1) {
signed char t;
deserialize_byte_io(geoms, &t, geompos_in);
@ -1449,7 +1461,7 @@ long long write_tile(FILE *geoms, long long *geompos_in, char *metabase, char *s
decode_meta(m, metakeys, metavals, stringpool + pool_off[segment], tmp_layer, tmp_feature);
tmp_layer.features.push_back(tmp_feature);
layer_to_geojson(stdout, tmp_layer, 0, 0, 0, false, true);
layer_to_geojson(prefilter_fd, tmp_layer, 0, 0, 0, false, true);
}
if (gamma > 0) {
@ -1525,6 +1537,27 @@ long long write_tile(FILE *geoms, long long *geompos_in, char *metabase, char *s
merge_previndex = index;
}
if (prefilter != NULL) {
if (fclose(prefilter_fd) != 0) {
perror("fclose output to prefilter");
exit(EXIT_FAILURE);
}
if (close(prefilter_read) != 0) {
perror("close output from prefilter");
exit(EXIT_FAILURE);
}
while (1) {
int stat_loc;
if (waitpid(prefilter_pid, &stat_loc, 0) < 0) {
perror("waitpid for prefilter\n");
exit(EXIT_FAILURE);
}
if (WIFEXITED(stat_loc) || WIFSIGNALED(stat_loc)) {
break;
}
}
}
first_time = false;
bool merge_successful = true;