PMIx Standard ABI Headers

PMIx Standard Version Compliance

PMIx Standard	PMIX_QUERY_STABLE_ABI_VERSION	PMIX_QUERY_PROVISIONAL_ABI_VERSION
pre-v5.0	No ABI defined	No ABI defined
v5.0	v1.0	v1.0

Layout of the headers

• pmix_types.h : PMIx Standard types, constants, and callback functions
• pmix_macros.h : PMIx Standard macros
  • pmix_abi_support.h : Non-standard support functions (prefixed with pmixabi_) to support the macro definitions
  • pmix_abi_support_bottom.h : Non-standard support functions (prefixed with pmixabi_) to support the macro definitions. These few functions also use the macros. As such, they need to be included at the bottom of pmix_macros.h
• pmix_fns.h : PMIx Standard API function pointer declarations for PMIx Standard APIs
  • The goal of this header to ease the incorporation of PMIx routines for applications and tools that wish to dlopen() a PMIx Standard compliant library and then dlsym() the various functions.

flowchart TB
    subgraph macros["pmix_macros.h"]
    direction TB
    s1["pmix_abi_support.h (Non-Standard)"] --- mid["PMIx Standard Macros"]
    mid --- s2["pmix_abi_support_bottom.h (Non-Standard)"]
    end
    pmix_types.h == Included by ==> macros
    macros == Included by ==> pmix_fns.h
    macros == Included by ==> pmix.h

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Using dlopen/dlsym

If your application intends to use the headers with dlopen() and dlsym() then the pmix_fns.h header is all that you need to include to use the PMIx Standard interface. The function pointer signatures are defined in pmix_fns.h in a form approprate for dlsym()