BOC v1.0: RS256 auth, Ledger integration, Prometheus metrics, CI/CD, backup

c-runtime/shm.c

@@ -0,0 +1,109 @@
+#include "shm.h"
+#include <sys/mman.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+
+struct crt_shm {
+    int fd;
+    void* ptr;
+    size_t size;
+    char name[256];
+};
+
+crt_shm_t* crt_shm_create(const char* name, size_t size) {
+    crt_shm_t* shm = calloc(1, sizeof(crt_shm_t));
+    if (!shm) return NULL;
+
+    strncpy(shm->name, name, sizeof(shm->name) - 1);
+    shm->size = size;
+
+    shm->fd = shm_open(name, O_CREAT | O_RDWR, 0666);
+    if (shm->fd < 0) {
+        free(shm);
+        return NULL;
+    }
+
+    if (ftruncate(shm->fd, size) < 0) {
+        close(shm->fd);
+        shm_unlink(name);
+        free(shm);
+        return NULL;
+    }
+
+    shm->ptr = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED, shm->fd, 0);
+    if (shm->ptr == MAP_FAILED) {
+        close(shm->fd);
+        shm_unlink(name);
+        free(shm);
+        return NULL;
+    }
+
+    memset(shm->ptr, 0, size);
+    return shm;
+}
+
+crt_shm_t* crt_shm_open(const char* name) {
+    crt_shm_t* shm = calloc(1, sizeof(crt_shm_t));
+    if (!shm) return NULL;
+
+    strncpy(shm->name, name, sizeof(shm->name) - 1);
+
+    shm->fd = shm_open(name, O_RDWR, 0666);
+    if (shm->fd < 0) {
+        free(shm);
+        return NULL;
+    }
+
+    struct stat st;
+    if (fstat(shm->fd, &st) < 0) {
+        close(shm->fd);
+        free(shm);
+        return NULL;
+    }
+    shm->size = st.st_size;
+
+    shm->ptr = mmap(NULL, shm->size, PROT_READ | PROT_WRITE, MAP_SHARED, shm->fd, 0);
+    if (shm->ptr == MAP_FAILED) {
+        close(shm->fd);
+        free(shm);
+        return NULL;
+    }
+
+    return shm;
+}
+
+void crt_shm_close(crt_shm_t* shm) {
+    if (!shm) return;
+    if (shm->ptr && shm->ptr != MAP_FAILED) {
+        munmap(shm->ptr, shm->size);
+    }
+    if (shm->fd >= 0) {
+        close(shm->fd);
+    }
+    free(shm);
+}
+
+void* crt_shm_ptr(crt_shm_t* shm) {
+    return shm ? shm->ptr : NULL;
+}
+
+size_t crt_shm_size(crt_shm_t* shm) {
+    return shm ? shm->size : 0;
+}
+
+int crt_shm_resize(crt_shm_t* shm, size_t new_size) {
+    if (!shm || !shm->ptr) return -1;
+
+    if (munmap(shm->ptr, shm->size) < 0) return -1;
+    if (ftruncate(shm->fd, new_size) < 0) return -1;
+
+    shm->ptr = mmap(NULL, new_size, PROT_READ | PROT_WRITE, MAP_SHARED, shm->fd, 0);
+    if (shm->ptr == MAP_FAILED) return -1;
+
+    shm->size = new_size;
+    return 0;
+}