issue/961: fix metax init with preload

Signed-off-by: Ceng23333 <441651826@qq.com>

Author: Ceng23333

python/infinicore/__init__.py

@@ -1,5 +1,9 @@
 import contextlib
 
+with contextlib.suppress(ImportError):
+    from ._preload import preload
+    preload()
+
 import infinicore.context as context
 import infinicore.nn as nn
 

python/infinicore/_preload.py

@@ -0,0 +1,121 @@
+import ctypes
+import os
+from typing import Iterable, List
+
+
+def _candidate_prefixes(path: str) -> List[str]:
+    """
+    Return HPCC install prefixes to search for libs.
+    Prefer HPCC_PATH; if absent and explicitly opted-in, fall back to /opt/hpcc.
+    """
+    prefixes: List[str] = []
+    if path:
+        prefixes.append(path)
+
+    seen = set()
+    unique: List[str] = []
+    for p in prefixes:
+        if p and p not in seen:
+            seen.add(p)
+            unique.append(p)
+    return unique
+
+
+def _try_load(paths: Iterable[str], name: str) -> bool:
+    """Try to load a shared library from given paths or system search path."""
+    for path in paths:
+        full = os.path.join(path, "lib", name)
+        if os.path.exists(full):
+            try:
+                ctypes.CDLL(full, mode=ctypes.RTLD_GLOBAL)
+                return True
+            except OSError:
+                # Try next candidate
+                continue
+    # Last resort: rely on loader search path
+    try:
+        ctypes.CDLL(name, mode=ctypes.RTLD_GLOBAL)
+        return True
+    except OSError:
+        return False
+
+
+def preload_hpcc() -> None:
+    """
+    Best-effort preload of key HPCC runtime libs with RTLD_GLOBAL.
+
+    This mirrors the behavior of torch's HPCC build that loads libtorch_global_deps.so,
+    but avoids introducing a hard torch dependency. All failures are swallowed.
+    """
+    hpcc_path = os.getenv("HPCC_PATH")
+    if not hpcc_path:
+        return
+
+    prefixes = _candidate_prefixes(hpcc_path)
+    libs = [
+        "libhcruntime.so",
+        "libhcToolsExt.so",
+        "libruntime_cu.so",
+        "libhccompiler.so",
+    ]
+
+    for lib in libs:
+        _try_load(prefixes, lib)
+
+
+def _should_preload_device(device_type: str) -> bool:
+    """
+    Check if preload is needed for a specific device type.
+    """
+    device_env_map = {
+        "METAX": ["HPCC_PATH", "INFINICORE_PRELOAD_HPCC"],  # HPCC/METAX
+        # Add other device types here as needed:
+        # "ASCEND": ["ASCEND_PATH"],
+        # "CAMBRICON": ["NEUWARE_HOME"],
+    }
+
+    env_vars = device_env_map.get(device_type, [])
+    for env_var in env_vars:
+        if os.getenv(env_var):
+            return True
+    return False
+
+
+def preload_device(device_type: str) -> None:
+    """
+    Preload runtime libraries for a specific device type if needed.
+
+    Args:
+        device_type: Device type name (e.g., "METAX", "ASCEND", etc.)
+    """
+    if device_type == "METAX":
+        preload_hpcc()
+    # Add other device preload functions here as needed:
+    # elif device_type == "ASCEND":
+    #     preload_ascend()
+    # etc.
+
+
+def preload() -> None:
+    """
+    Universal preload function that loops through device types and preloads when required.
+
+    This function detects available device types and preloads their runtime libraries
+    if the environment indicates they are needed.
+    """
+    # Device types that may require preload
+    device_types = [
+        "METAX",  # HPCC/METAX
+        # Add other device types here as they are implemented:
+        # "ASCEND",
+        # "CAMBRICON",
+        # etc.
+    ]
+
+    for device_type in device_types:
+        if _should_preload_device(device_type):
+            try:
+                preload_device(device_type)
+            except Exception:
+                # Swallow all errors - preload is best-effort
+                pass