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#define _POSIX_C_SOURCE 200809L
/* Linux-only evidence harness: 1000 real initialized scalar instances of the
* same prepared app. It measures their process RSS delta, not a full service. */
#include "plan.h"
#include <inttypes.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
extern const PureScalarPlan pure_app_plan;
static long rss_kib(void) {
FILE *file = fopen("/proc/self/status", "r");
if (!file) return -1;
char line[256];
long result = -1;
while (fgets(line, sizeof(line), file)) {
if (strncmp(line, "VmRSS:", 6) == 0) {
if (sscanf(line + 6, "%ld", &result) != 1) result = -1;
break;
}
}
fclose(file);
return result;
}
int main(void) {
enum { COUNT = 1000 };
PureScalar **instances = calloc(COUNT, sizeof(*instances));
if (!instances) return 2;
long before = rss_kib();
size_t bytes = pure_scalar_bytes();
uint64_t checksum = 0;
for (size_t i = 0; i < COUNT; ++i) {
void *memory = malloc(bytes);
if (!memory) return 2;
instances[i] = pure_scalar_initialize(memory, bytes);
if (!instances[i] || pure_scalar_load(instances[i], &pure_app_plan, NULL, NULL)) return 2;
checksum += pure_scalar_info(instances[i], 4);
}
long after = rss_kib();
if (before < 0 || after < before || checksum != COUNT) return 2;
printf("{\"instances\":%u,\"instance_bytes\":%zu,\"rss_before_kib\":%ld,"
"\"rss_after_kib\":%ld,\"rss_delta_kib\":%ld,\"checksum\":%" PRIu64 "}\n",
COUNT, bytes, before, after, after - before, checksum);
for (size_t i = 0; i < COUNT; ++i) free(instances[i]);
free(instances);
return 0;
}
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